IGCSE/GCSE/O & A Level/IB/University Student Forum
Qualification => Subject Doubts => IGCSE/ GCSE => Miscellaneous => Topic started by: astarmathsandchemistry on May 23, 2009, 10:44:54 am
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who is ready? Exam is after 4 days, discuss everything related to the syllabus ONLY HERE so its organised :)
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im only doing past papers now !!
god be with us :)
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i'm actually studying because i didnt since beginning of grade 10, haha always thut its easy but then screwed up in mocks hehe, how many years do u think is enough for an A*?
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i'm actually studying because i didnt since beginning of grade 10, haha always thut its easy but then screwed up in mocks hehe, how many years do u think is enough for an A*?
im not really sure ??
i got a B in my mocks, so im hoping for an A in the real one ;)
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same here, B in the mock, however i really want am A* :) i hope the exam comes reasonably easy because im preparing good, but afraid of last question ALGORITHMS! :S
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Anyone knows how many years should be enough for an A*? Thanks in advance :)
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same here, B in the mock, however i really want am A* :) i hope the exam comes reasonably easy because im preparing good, but afraid of last question ALGORITHMS! :S
ya, i always mess up the algorithims !! >:(
do u have good notes for algorithims? :)
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u know my teacher's noter are pretty fantastic, but they dont have thaaat much abt algorithms, but he gave us all algorithm questions in one worksheet so we can practice, Do YOU have anylinks for useful algorithm notes?
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plz specify any algorithm queestion u have doubts in....it can be from any year's past paper..i'll try n help u... :)
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thanks edie, lemme eat lunch and i will tell u =)
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plz specify any algorithm queestion u have doubts in....it can be from any year's past paper..i'll try n help u... :)
june 07, q19, plz =)
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ANYONE??? ???
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Algorithms!!!! notes anything pleasezzzzzzzzzzz
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atleast say specific doubt on algorithms........ what kind of problem like on pesudocode?
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can anyone explain what is pilot implementation?
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pilot implementation is when u implement a system gradually over a period of time. this means that u implement the system bit by bit and remove the old system bit by bit.
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i attached some notes, theyr'e a gr8 help (i got them from a member (i think he's called copley))
enjoy :)
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thanx.....isnt the phased implementation same thing as pilot?
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yes, it's the same.
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microprocessor system.....WASHING MACHINE
When dey say rite input processing output wat shall i rite
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i'm not very sure about this but i think it is
input - temperature reading
processing - database lookup
output - actuator to control temperature
i'm not 100% sure because i don't take computer studies.
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okay......thanx :)
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i'm not very sure about this but i think it is
input - temperature reading
processing - database lookup
output - actuator to control temperature
i'm not 100% sure because i don't take computer studies.
Temperature reading will be a process,not input... input will probably be power inserted.
Processing will be temperature sensor check to see if its too hot, powder sensor to see if the powder is sufficent.
Tell me something, which passpaper did you get this from?
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temperature reading is definitely not a process.
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i'm not very sure about this but i think it is
input - temperature reading
processing - database lookup
output - actuator to control temperature
i'm not 100% sure because i don't take computer studies.
Temperature reading will be a process,not input... input will probably be power inserted.
Processing will be temperature sensor check to see if its too hot, powder sensor to see if the powder is sufficent.
Tell me something, which passpaper did you get this from?
i don't take computer studies. but i have a lot of general knowledge about this stuff.
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i know many ppl will not believe me .... but its true..i know that temp. reading is an input
the word "reading" says it all...input...read
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thank you all for the useful help, and more is welcomed :)
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sry i meant its an input...y did i write the "not"
i know many ppl will not believe me .... but its true..i know that temp. reading is an input
the word "reading" says it all...input...read
ahhh ok! do u take computer studies?
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yeah..i do ..i find the algorithm questions easy..
and all the rest is theory,,
its sure shot an A*
the coursework is little tricky though
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sorry, i don't take computer studies! :D
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oh..cool!
then i may edit my previous post..
lol
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no probs!
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The psuedo code questions at the last at quite tough any sort of help on tht will be appreciated
Thanxx in advance
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Salaam ppl. Hope the washing machine question was answered. If not , hope this helps :
Input : Washing time, Temperature, Load size, number of cycles.
Process: Opening inner valves (water), adjusting heater/cooler, Time decrease counting (decrementation!?!), signals to the motor.
Output: Clothes are washed, temperature is maintained, water level in machine reavches level required for the load.
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i'm not sure if the processes r right.
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ya, muslimah tht is correct i think
so anyone has given cousework already? so wht was the cousework name?
mine was CD rental system.....boring!!!
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mine was hospital
Eddie, u didnt answer the question i set, June07 q19, thanks
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i am starting to improve significantly in algorithms, i finished studying the syllabus (only few simple stuff left), i am doiing all algorithm questions sice MAY/JUNE 2000 till NOV 2008,
How About you guys? :)
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i agree wid godfatgher...temp reading is definately is an input..
So by that logic, when you enter commands in the computer, and the computer reads those commands, its an input? ::)
Input would be you PUTTING in those commands, and processing would be when the computer READS them.
Similarly when you are reading this information, you are not inputting it, but this information is being processed by your brain, think logically, that goes for you too godfather.
Input:Whatever goes into the computer. Input can take a variety of forms, from commands you enter from the keyboard to data from another computer or device. A device that feeds data into a computer, such as a keyboard or mouse, is called an input device.
(v.) The act of entering data into a computer.
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hey rekomeko heres your answer
#include<stdio.h>
#include<conio.h>
void main()
{
int c,d,v,b,x;
clrscr();
c=0;
d=0;
v=0;
b=0;
count=0;
for(count=0; count<=5000; ++count)
{
scanf("%d",&x);
if
{
10000<=x<20000; c=c+1
else if, 20000<=x<30000; d=d+1
else if, 30000<=x<40000; v=v+1
else if, 40000<=x<50000; b=b+1
}
count = count +1
}
print c,d,v,b,x,count'
getch();
}
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i hope u understood now...
the logic is simple
int the end u get to know the no. of cds, dvds, books and videos
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hey rekomeko heres your answer
#include<stdio.h>
#include<conio.h>
void main()
{
int c,d,v,b,x;
clrscr();
c=0;
d=0;
v=0;
b=0;
count=0;
for(count=0; count<=5000; ++count)
{
scanf("%d",&x);
if
{
10000<=x<20000; c=c+1
else if, 20000<=x<30000; d=d+1
else if, 30000<=x<40000; v=v+1
else if, 40000<=x<50000; b=b+1
}
count = count +1
}
print c,d,v,b,x,count'
getch();
}
wat da hell is this!!!!!!!!
do u rite algo like this cuz this is in no way a pseudo code
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welcome..rekomeko....but don't paste this in turbo c+++..
its not totally a coding...
its logic + coding..
@creature_x--- i guess your right..maybe i'm confused...but thats how u learn..
thanks...any idea which past paper it was??
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hey rekomeko heres your answer
#include<stdio.h>
#include<conio.h>
void main()
{
int c,d,v,b,x;
clrscr();
c=0;
d=0;
v=0;
b=0;
count=0;
for(count=0; count<=5000; ++count)
{
scanf("%d",&x);
if
{
10000<=x<20000; c=c+1
else if, 20000<=x<30000; d=d+1
else if, 30000<=x<40000; v=v+1
else if, 40000<=x<50000; b=b+1
}
count = count +1
}
print c,d,v,b,x,count'
getch();
}
wat da hell is this!!!!!!!!
do u rite algo like this cuz this is in no way a pseudo code
dude really WHAT THE HELL IS THIS, it was J07 last question
thats very confusing and totally not an puesdocode
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this is wat rekomeko asked for..
the algo. question always says..
"Write an algorithm, using pseudocode or otherwise, ..."
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its C programming + logical statements..
we are taught like this in our school
we learn this from 8th grade...
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i think the logic is correct
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this is the correct one:::
set c, d, v, b = 0: set count = 0
repeat
input code
if code >= 1000 and code < 2000 then c = c + 1 }
else if code >= 2000 and code < 3000 then d = d + 1 }
else if code >= 3000 and code < 4000 then y = y + 1 }
else if code >= 4000 and code < 5000 then b = b + 1 }
else print “error” 1 mark
count = count + 1
until count = 5000
print c, d, v, b
HOPE U GET IT NOW ::) ;D ;)
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i think the logic is correct
YES!!!!!!!
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its not about being correct or wrong..
the logic has to be correct,,,
it does not depend on the way u present it...
it can be algo. pesudo, or even programming..(like i did)
and ya what cactus said is also correct...its the same in the markscheme
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yeah then u did the otherwise way haha
no we were taught like cactus said the simplest one ;D
anyways man thanks for any help
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welcome bro..
here in india, many schools teach programming to the student
i use turbo c++ to verify all my programming...!!
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welcome bro..
here in india, many schools teach programming to the student
i use turbo c++ to verify all my programming...!!
nice
C++ is really cool
i heard ppl can do alot of stuff using c++
ny ways i m also taking 0420/a
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@ADI HOW IT TOOK U TO LEARN C++?????
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@mjerrar - ur right...it is really cool!!..
but it requires a lot of patience as one tiny little error can blow the whole program up...
@cactus - it was fun learning c++...it was easy to grasp...our teacher is amazing at programming..
u shud try it too...its awesome!!!
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ADI:HOW LONG IT TOOK U TO LEARN
ALSO IF U HAVE ANY E-BOOKS REGARDING C++ PLZZ SEND IT TO ME!!!!!
CUZ I WANNA LEARN IT TOO
THANX
ur school rocks!!!!!
my school sucks!!!!!
they taught us how to use microsoft office in gr8 lol............
its really embaressing!!!!!! :o :( >:( ;D :D
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hey cactus ... it took me 7-8 months.....
and...sry i don't have any e-books...but i can recommend a book if u wanna learn c++
its called ansi C by E. BALAGURUSWAMY..
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guys if u hav any algorithm Qs from 2000 in the past papers, feel free to post them..
cuz i hav solved all the Qs and checked wid my teacher.
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guys if u hav any algorithm Qs from 2000 in the past papers, feel free to post them..
cuz i hav solved all the Qs and checked wid my teacher.
haaaaaaaaaaaaaaaaaaaaaniiiiiiiiiiiiiiiiiiiiiii hahah welcome!! :P
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anyone knows how many years of past papers should be enough for an A*??
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plz post da the answer 4 algo nov 2001
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plz post da the answer 4 algo nov 2001
okayy............soon :D
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hey cactus i don't have the paper..
cud u plz upload it...!!!
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hey cactus i don't have the paper..
cud u plz upload it...!!!
no prob eddie i will handle this :D
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k..u handle it..
but i need the paper for my reference..
don't worry..
-ADi
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k..u handle it..
but i need the paper for my reference..
don't worry..
-ADi
sorry couldnt find it i got the hard copy
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How to solve these algorithm questions in general like wat shud be the approach
and wat are the most important topics tht we shud concentrate on
!!!!!!
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u have to look at the question very carefully...and identify wat type of algo. it might be
think abt wat to use...maybe a loop...if so ...which 1?
also, keep it simple...don't complicate ur algorithms using many loops...u maybe able to merge all the loops to from 1 loop
if u don't answer the algo. question correctly, still u have good chances of getting some marks...if ur logic, loop or any imp. statement is correct..
chk out the markscheme for more help..
hope it helped u
thanks :)
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plz post da the answer 4 algo nov 2001
cactus here is your answer:
IF customer is employee THEN
check type of product
IF product is electrical THEN
discount is 10%
else
input number of years of work
IF number of years of works is greater than or equal to 5 THEN
discount is 20%
else
discount is only 10%
end if
end if
else NO discount (THIS IS FOR THE IF THAT SAYS IF IT IS AN EMPLOYEE BECAUSE ONLY THEM GAIN DISCOUNT)
end if
HOPE THIS HELPED :D
end if
:D
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hey rakan, thanks for the warm welcome man.. hehe ;D
nice answer up here (wonder who helped u out wid it???? :D)
any way.. i thout id just post in a more presentable way so that it is clear which commands belong to which if statment
.. here:
Check customer status
IF customer is employee THEN
check type of product
IF product is electrical THEN
discount is 10%
else
input number of years of work
IF number of years of works is greater than or equal to 5 THEN
discount is 20%
else
discount is only 10%
end if
end if
else
NO discount
end if
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hey rakan, thanks for the warm welcome man.. hehe ;D
nice answer up here (wonder who helped u out wid it???? :D)
any way.. i thout id just post in a more presentable way so that it is clear which commands belong to which if statment
.. here:
Check customer status
IF customer is employee THEN
check type of product
IF product is electrical THEN
discount is 10%
else
input number of years of work
IF number of years of works is greater than or equal to 5 THEN
discount is 20%
else
discount is only 10%
end if
end if
else
NO discount
end if
haha ur welcome
ya walla man i am confused with the spacing and arrangement :S
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can anyone help ME with JUNE04 q.15(b)
thanks in advance
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its easy u just have to substitute the values for C-temp and perform the formula
therefore...1 --> 33.8
and 5 --> 41
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i'll try the b part now
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thanks for the help i know its easy
i asked for part b, (A) is easy i know :D:D
waiting.................:) thanks again
i dont get how ur gna time the hours
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http://www.freeexampapers.com/Dndex.php?d=SUdDU0UvQ29tcHV0ZXIgU3R1ZGllcy9DSUUvMjAwNSBKdW4=&catagory=
This is the paper ( may/june 05.)
Last question
This is what I wrote, Need someone to tell me weather correct or not.Thankyou.
Set "Distinction" "Mert" "Pass" "Fail"
While mark <= 25 do
Input mark
If mark >69 than "Distinction"
if mark >60 AND <69 than "Mert"
If mark >50 AND <59 than "Pass"
End if
Print Distinction Merit Pass Fail
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http://www.freeexampapers.com/Dndex.php?d=SUdDU0UvQ29tcHV0ZXIgU3R1ZGllcy9DSUUvMjAwNSBKdW4=&catagory=
This is the paper ( may/june 05.)
Last question
This is what I wrote, Need someone to tell me weather correct or not.Thankyou.
Set "Distinction" "Mert" "Pass" "Fail"
While mark <= 25 do
Input mark
If mark >69 than "Distinction"
if mark >60 AND <69 than "Mert"
If mark >50 AND <59 than "Pass"
End if
Print Distinction Merit Pass Fail
i am sorry but this is completely wrong.......correct answer.....................
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i guess its this way
-------------------------------
we take sum, average --> for average...
and as the markscheme says...min and max...too,,,,to compare the values and swap them accordingly..
we limit count to 24 as there are 24 hours in a day..and they want the readings hourly
the markscheme sets the min too 100 and max to 0....because a normal temperature reading for a day (0-50) will fall atlesast in 1 range
============================
sum = 0
min = 100
max = 0
count = 1 (initially)
let the temp be x
for (count=1;count<=24;count +1)
{
input x
F= (x*1.8) + 32
sum = sum + F
if F <min, min = F
if F >max, max = F
(note theres no else)
increment count
}
average = sum/24
print average, max, min
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i guess its this way
-------------------------------
we take sum, average --> for average...
and as the markscheme says...min and max...too,,,,to compare the values and swap them accordingly..
we limit count to 24 as there are 24 hours in a day..and they want the readings hourly
the markscheme sets the min too 100 and max to 0....because a normal temperature reading for a day (0-50) will fall atlesast in 1 range
============================
sum = 0
min = 100
max = 0
count = 1 (initially)
let the temp be x
for (count=1;count<=24;count +1)
{
input x
F= (x*1.8) + 32
sum = sum + F
if F <min, min = F
if F >max, max = F
(note theres no else)
increment count
}
average = sum/24
print average, max, min
oh so you just put the counter to 24 and do the rest like usual??
thanks man really helped
+rep :D
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hey creatur x ... its not completely wrong..ur logic is still correct..
only minor changes required..
========
Set m, p , d, f
While x <= 25 do (don't use mark again here, use another variable like count)
Input mark
If mark >69 then then d=d+1
else if mark >= 60 AND <=69 then m=m+1
else If mark >=50 AND <=59 then p=p+1
else f=f+1
print m, p, d, f
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u identified the result for each student but forgot to count them..u also forgot to include 60 and 50...
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i HAVE THIS FOR CREATURE'S ANSWER..........
Set DISTINCTION, MERIT, PASS, AND FAIL TO 0
SET COUNTER TO 0
While counter is < 25....DO
Input mark
Case mark of
greater than 69=distinction=distinction+1
greater than 60 or less than 69=merit=merit+1
greater than 50 or less than 59=pass=pass+1
otherwise
Fail=fail+1
end case
counter=counter+1
end while
PRINT Distinction merit pass or fail
I HOPE THIS IS CORRECT AND IT HELPS :D
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thats correct rekomeko ... only a few minor changes..
=========
Set DISTINCTION, MERIT, PASS, AND FAIL TO 0
SET COUNTER TO 0
While counter is <= 25....DO
Input mark
Case mark of
greater than 69=distinction=distinction+1
greater than or equal to 60 or less than or equal to 69=merit=merit+1
greater than or equal to 50 or less than or equal to 59=pass=pass+1
otherwise
Fail=fail+1
end case
counter=counter+1
end while
PRINT Distinction merit pass or fail
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oh ya the equals, thanks for the correction
:D still looking for your papers :)
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hey thanks bro...
i hope i'm not disturbing you..
if its troubling you..its ok...i'll find it myself
sry
and thank u once again.
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hey thanks bro...
i hope i'm not disturbing you..
if its troubling you..its ok...i'll find it myself
sry
and thank u once again.
noooo man ofcourse ur not disturbing me, i love looking for stuff on the internet haha lolz
NO PROBLEM BRO, :D
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tks mate
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can anyone do the algo for nov 2003!!!!!
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heres ur answer...
-------
x- number of values out of range..
y - percentage
-----------------
x=0
repeat
{
input number
if number < 1000 or number > 9999
then x = x+1
endif
until count<=50
y = x/50 * 100
print x, y
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Can anyone tell why do we use firewall?
is this correct answer
firewall is used to prevent any unauthorised programs, users to access our computer?
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A firewall is a device, or a piece of software that is placed between your computer and the rest of the network (where the hackers are!)
If you wish to protect your whole LAN from hackers out on the Internet, you would place a firewall between the LAN and the Internet connection.
A firewall blocks unauthorised connections being made to your computer or LAN. Normal data is allowed through the firewall (e.g. e-mails or web pages) but all other data is blocked.
In addition to physical devices, firewalls can also be software. In fact most computer operating systems have a software firewall built in (e.g. Windows, Linux and Mac OS)
Obtained from www.igcseict.com
sarsam: That is correct.Mainly in our syllabus. We use it as one of the answers fr preventing hacking...
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Salaam! Can sum1 please help me with this?
-What's parameter passing?
-How are expert systems used in "car diagnostics"?
-How are expert systems used in the constructions industry for quantity/surveyor costings??!?!
-It says in the mark schemes that Wireless LAN has a slower speed than Net Access. I'm not so sure how these two are actually different?
-Wired Internet connections are faster than Wireless? ( Mark scheme)
- Information/ Multimedia kiosks in airports, etc.... What exactly are they?! Not so clear on the concept.
Thank u in advance!
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ADI....OR ANYONE
CAN U DO DA ALGO FOR J 2003 AND JUNE 2002????
THANX
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ADI....OR ANYONE
CAN U DO DA ALGO FOR J 2003 AND JUNE 2002????
THANX
sure, answer in next reply :D
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i'm too confused abt these ones..
rekemeko plzz help! ???
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i'm too confused abt these ones..
rekemeko plzz help! ???
yeah they are kinda stupid but they dont come anymore in new years
i am still solving them............... :o
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Obviously wired internet connections r faster than wireless connections
CUZ in wired ones direct a cable is used no data losses, no hindrances
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ADI....OR ANYONE
CAN U DO DA ALGO FOR J 2003 AND JUNE 2002????
THANX
ok here are your answers, they are sooo tough!.......
JUNE 2002
set Number of sales=0
set Number of refunds=0
set total amount of money in till=0
Input money value
IF money value is sale THEN
Number of sales= Number of sales+1
Total amount in till=Total amount in till+money value
else IF (you can use this else if without putting an end if for it)
money value is refund THEN
Number of refunds=Number of refunds+1
Total amount in till=Total amount in till-Money value
End IF
Output number of sales, number of refunds and money in till
JUNE 2003
Set Counter, Logged on, and Logged off=0
Set Start time, End time, and Used time=0
While counter is < 30 DO
IF student is logged on THEN
Logged on=Logged on+1
Record Start Time
Else IF
Student is Logged off THEN
Logged off=Logged off+1
Record End Time
END IF
Time Used= Time Used+(End Time-Start Time)
Counter=Counter+1
END WHILE
Output Time Used Divided by 30 (number of students)
I HOPE I HELPED AND THANKS :D
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THANX WAT ABT J 2003
?????
WHICH SCHOOL IN RIYADH?
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THANX WAT ABT J 2003
?????
WHICH SCHOOL IN RIYADH?
DUDE JUNE 2003 IS BELOW JUNE 2002 I DID BOTH IN THE SAME REPLY :D
i am in manarat al riyadh you?
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oh yeah!!!11 my bad.............
i didnt see that.....ur school is cool!!!!! u guyz even hav a horse do u have horse riding competitions tooo
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oh yeah!!!11 my bad.............
i didnt see that.....ur school is cool!!!!! u guyz even hav a horse do u have horse riding competitions tooo
no +rep for me?? :P
yeah man but sometimes they are stuuuupidd the school, yeah we got horses man :D but nah dont use them alot
what about you what school are you in?
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ooops!!!!!! sorrry there u go +rep 2 times ;) ;)
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i cant rep 2times wat da hell??
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i am in middle east international school totally sucks!!!!!!!
u must be havin computer notes by mr.mansoor??? ;) :D :)
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i am in middle east international school totally sucks!!!!!!!
u must be havin computer notes by mr.mansoor??? ;) :D :)
haha tough luck :P
YEAAAAAH MAAAN HAHA SOUNDS COOL HEARING THAT FROM A GUY IN THE FORUM AHAH :P
YEAH HIS NOTES ARE FABULOUS AND HE IS TEACHING IS EVEN BETTER!! :D
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i cant rep 2times wat da hell??
yeah man after two hours, hheeh THANKS anyways :D
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i have da worst teacher ever.........i asked him da algo of j 2003 and he gave me A 2 PAGE STUPID ANSWER!!!!!!!!!!!!!!!
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i have da worst teacher ever.........i asked him da algo of j 2003 and he gave me A 2 PAGE STUPID ANSWER!!!!!!!!!!!!!!!
loooooooooooooool, so mine is good :D???
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do u have papers 4 j 1999
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do u have papers 4 j 1999
yes, but its a hard copy, ill look for it on internets :D
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do u have da mark scheme from 1999 2 2001
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do u have papers 4 j 1999
yes, but its a hard copy, ill look for it on internets :D
GOT IT :D there u go :D...........
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i have hard copy from 1993 to 2008 lol but do u have the mark scheme till n2001
plz give if u have thanx
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do u have papers 4 j 1999
sorry man i dont have these :(
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WAT.................i am asking 4 da mark schemes
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WAT.................i am asking 4 da mark schemes
you didnt say that u said gve me PAPERS PAPERS DONT MEAN MARK SCHEMES
ANYWAYS I DONT HAVE THEM -_-
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not even a mark scheme 4 j2001 n n2001??
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not even a mark scheme 4 j2001 n n2001??
nop man so sorry
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PLZ............... ANSWER DA ALGO 4 N2000 PLZZZZ
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plzz upload the paper...
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i hav a hard copy!!!!!!!!
-
well..!!
i'm sry in that case i can't help you
:(
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i will do it in 30 minutes :D
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Does anyone has all the definations tht can come so plzzz attach it plzzzzz
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HEY GUYS, THATS FOR YOU, COMMONLY ASKED QUESTIONS AND THEIR MODEL ANSWERS INCLUDING ALGORITHMS!!! :D
-
i posted that before
-
i posted that before
oh really!! :O
never realised :P
-
i posted that before
oh really!! :O
never realised :P
no u didnt, just searched through the topic, you didnt!! -_-
-
search it again.................rakan
-
search it again.................rakan
never mind, but how da hell do u knw my name? :S
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i posted in q80boys thread
-
i posted in q80boys thread
HOW DO you KNOW MY NAME!!?
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:D :D :D :D :D :D :Dadi told everyone!!!!!!!!!!!hahahaha :D :D :D :D :D :D :D :D :D :D :D
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lool now every1 knws ur name ghanameh
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lool now every1 knws ur name ghanameh
WAT ON THE EARTH IS GHANAMEH?????? :-X :-X :-X :-X
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nthng cactus......its just a secret code :P :P
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SO UR GIVING COMP. IN THIS SESSION
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any one can do da algo 4 n2000 and j2000???????
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IGCSE (CIE) Computer Studies Paper 1 May/June 2004
Page 6
Q.9 Part (b)
Please help guys !! :'(
Thanks :)
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IGCSE (CIE) Computer Studies Paper 1 May/June 2004
Page 6
Q.9 Part (b)
Please help guys !! :'(
Thanks :)
a check digit calculation is performed on the barcode
if its remainder is 0 then the barcode is read correctly
hope this helps
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IGCSE (CIE) Computer Studies Paper 1 May/June 2004
Page 6
Q.9 Part (b)
Please help guys !! :'(
Thanks :)
a check digit calculation is performed on the barcode
if its remainder is 0 then the barcode is read correctly
hope this helps
thanx dude, +REP ;)
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ur welcome. ........how do u hav 1031 posts......i am surprised.................
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ur welcome. ........how do u hav 1031 posts......i am surprised.................
i guess im a talkitive person :P
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lol.............also an informative person
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Definations for:
Macro
Systems design
Fax
Plezzzzzz as soon as possible
thnxxx
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ur welcome. ........how do u hav 1031 posts......i am surprised.................
i guess im a talkitive person :P
Haha see astar's
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lol....yeah n even see urs toooo........ i actually never noticed
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A macro is a single instruction or hot key that replaces a sequence of instructions to perform a particular task . Ex: A macro for a routine print in a spreadsheet program.
Systems Design : This is a stage of the system life sycle in which the new system is designed to meet objectives set out earlier. File structures,validation rules, input specifications/screen, output screens/specifications,hardware and software to use,test strategy, system flowcharts,data flow diagrams ,algorithms,etc. are all decided upon or designed for the NEW system.
(Not exactly a proper definition though)
Fax: This is short for fascimile message. This is basically the message content sent from one place to another electronically using telephone lines. It can be obtained as a hard copy on paper.
Hope this help igcseboy...
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muslimah wr do u live in ksa????
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Riyadh...
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ok so which skool
manarat!!!!!!!!!
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hey guyz can any1 tell me the
DATA PROTECTION RULES...?
and what are the task done in each stages of SYSTEM ANALYSIS..
.
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Yes,cactus.Manarat...of course...lol
Anyways,
Data Protection Rule
- was introduced in 1984 and relates to the collection, storage, and distrbution of personal data about individuals.
- 3 ppl involved
1. Data User
2. data subject
3. Data authority or Data Protection controller ( He's the guy who imposes all the fines and puts u in trouble if you break the laws...)
Rules include:
1. Data held about individuals should be kept up to date and accurate
2. It must be kept for lawful, specified, and registered purposes only
3. It must not be kept for longer than is necessary for that purpose
4. Adequate security measure will be taken to protect data held against access by unauthorised users, illegal modification, or disclosure in inappropriate manners
5.The data subject shall have all rights to view data held about them, have it updated or corrected wherever appropriate.
6. It should be processed in manners compatible with the specified purposes only.
7. Hackers will be prosecuted. and fines imposed if laws are broken.
Certain authorities are exempted from these laws such as the police,military agencies,etc.
Umm....system analysis is sorta looong. Here's what you can do. Open ur Past papers. Look for a syst. analysis full-fledged question. Find the mark scheme ( use freeexampapers.com if u havent already got them). Learn off the answers by heart....5-6 for each to be on the safe side. The teachers put it in different ways in the notes sumtimes, although its all the same. U can go through all the syst. analysis questions in last 10 years if uve got time... That should be enuff. Plus, learn definitions for stuff like system life cycle, system analyst, etc. they've been cming up wid stupid ques. in the definition section l8ely....like define "mouse"...lol.
Anyway, hope that helps!
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sum1 -Repped me? im offended....I only had one...so unfair....
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IF anyone of the rule is disobeyed........ it will result in having to pay fines or even subjected to jail......
for the system analysis....refer to the site www.igcseict.info
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sarsam....do u got to manarat?
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when they asked to write difference between a compiler and an assembler ......
marksceme answer that assembler is one to one and compiler is one to many.........
what that mean?
another one.........
can anyone describe the sensors used in microproceeser controlled camera?
like i wrote light and motion sensors....but how do i describe?
for the above, describe how the data collected by the sensors would be used by the camera's control program?ansewr should be in reference to these sensors..... what i will write in this...
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nope.....i go to B.I.S(bangladesh international school) :)
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Ms. Nidhi teaches you ?
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no........actually..
in our skool teachers randomly changes...... :( that made it worse......
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Compilers and Assemblers:
Compilers convert one high level language into many machine languages, which is why it's "portable" as in it converts into the machine lang for the particular machine/computer
Assembler converts one assembly lang. into only one machine code, thus it's machine-prientated/machine-dependant.
The other difference is that assembler are written for a particular machine code and compilers for a particular HLL.Isn't it?
Lol...this is good revision...
About the camera:
Basically, The camera receives input from sensors like infra-red sensors, light sensors ( measure light intensity), proximity sensors
( measure of distance from object photographed).
Control program uses this data to calculate apertures, shutter speeds, focal length for image.
It then adjusts the autofocus/zoom feature, autoflash feature according to the data recieved from the sensors. It may insert date/ time pic was taken or a name for the pic too.
That should be enuff. Remember going through mark schem for this one...but dunt remember all the other options.
Hope this helps!
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Oh...I didnt know there were any other Comp teachers at BISES. Ms. Nidhi dusnt teach IGs anymore? Krishnakumar left last yr though rite? R u giving the exam in this session?
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:THANX...IT IS REALLY GREAT HELP...... :)
Another one what is check sum?
are u referring bis skul in riyadh? i actually study in dammam one, thus i dunno any teachers u mentioned.....
my teacher was musharraf sir......though he left also
and yes i m giving in this session......i m deadly scared......only two i m giving comp and other one is already over eng language
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wat time is it at ur end?!
Check Sum:
This is an extra digit which is transmitted along with a block of data being sent across a network. It is used to perform a transfer check at the other end. It is often a count of the number of bytes of data being sent. It is retotalled at the other end and compared with the figure received.
My teacher explained it wid the xample COMPUTER8.
But in the mark schemes , the xample given is Hash total (I think). I'm not so clear on what a hash total is either...don't ask...lol
It's supposed to be a "meaningless " total. Dunno how tht makes sense.
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even i noticed in the markscheme.....hash total is actually meaningless total........the def is that a meaningless totals of numbers used to check that all the numbers have been entered into the computer......tht all i know......
between it is now 2 55am.......
wht abt urs?
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lol...don't be scared sarsam. Us ppl have got much more to be scared abt... I still have Biz P2,Acc p3, Phys P3, and those MCQ oaoerz left after comp.Atleast ur done this Wed. Lucky u...
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2:58 AM now...ive become nocturnal last few months...prbbly u have same prob or exam tension. I was revising networks in teach-ict.com.
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i am lucky this time only........though i have faced worse in the last session oct/nov 2008....i had appeared five subjects ( add maths, gen maths, bio, chem phys)...........and omg it continously exams was going on for almost 4 weeks...... >:(.
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i always have exam fever......... i am currently solving past papers.........i regret i was too lazy through all this last few months..... :(
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soo much maths...lol. Yh, well atleast IGs finally over after this! Insha'Allah! Did u get good grades last time?
I've only done like 6-7 papers...intend to spend tomorrow doing a few more..Insha'Allah.
But yh, Past papers was all i mainly did fr other examz thruout yr...they were like PPQ marathons! So i guess thts why im not so stressed abt that. W8 till morning cmz, I'll prbbly b freaking like hell....hehe. I have an odd feeling of wanting to barf in the hours b4 the exam...exam fever!....lol
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r u a girl?
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i got all the subject A*, i.e 5 A*
lolz.......usually my mouth goes dry before exam.....thus i cudnt make any sound ;D
yep, i m girl. you?
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another doubt......what is template? esp in this question.
give 1 benefit of using a template for this spreadsheet(may/june 03)q 11 e
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Yup...lol...im a girl 2. Pretty obvious frm the user name "muslimah". Ur Oct 08 exams for physics was pretty hard though...atleast i founf it hard while solving. Hope ourz is easy. Mash' Allah all A*z. Hope we all get same results this time as well! Insha'Allah...
By the way, for tht question. A template is sort of like a pre-designed format. Like in the spreadsheet the template would already have format and formulas filled in and u'd just have to put in th efigures. This makes it easier, quicker, more convenient. Sumwhat like in Desktop publisher, where u've got all those different designs to choose from. You just put in the pics and text, customise.
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Hii! Was solving PPQ and noted the following....
TIP: Whenever u have to put down validation checks anywhere, avoid "presence check" and "check digit".
They've got 0 marks written for the answer in lots of mark scheme answers.
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Hii! Was solving PPQ and noted the following....
TIP: Whenever u have to put down validation checks anywhere, avoid "presence check" and "check digit".
They've got 0 marks written for the answer in lots of mark scheme answers.
oh really?? thanks!!
this often comes by spreadsheets right??
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it comes with database...dunt remember sprdsheets or not. Whatevr form it cms in, just rmmber no presence check.
Ppl...Biometric methods are methods of software security...? Rnt they?
Uggh, I'm forgetting stuff I noe!
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nope....i think for physical security toooooo.....
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hey guys
i am currently preparing a document which has all commonly asked questions and my predicted ones, i will attach it some time today
THANKS hope it helps :D
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That would really help :)
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GUYZ SING THIS OUT:
"i dont care, who u r" nanana "where u from" lalala "dont care wat u do, AS LONG AS U HELP ME" NA NA NA
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can somebody explain what is assembler, interpreter, compiler and what r differences between them?? just in bullet points so that its easy to remember. (i saw this question asking the difference between them long time ago in past paper but forgot.)
thx in advance
(panicking for tomoro)
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muslimah.......
mostly check digit isnt there ....but in case when they about about for long code, check digit are there........
assembler.......translate low level lang to machine code......
compiler..........translate high level lang to machine code (for translate whole system)
interpreter.......translate high level lang to machine code(traslate line by line)
remember assembler is one to one......as it isnt portable
while the compiler and interpreter is one to many.......as it is portable
i hope it is correct.........
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@ Musllimah thanx alot for the definations above
+ rep u.......
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igcseboy!!!!! above one i wrote!!!!! ;)
though u shuld also muslimah.......she really help us....and Mashallah genius too.. :)
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@ Sarsam not abt tht abt her definations on pg 10 i asked previously
anywayz + rep for u too ;)
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WAIT FOR THE MOMENT WHEN I ATTACH MY DOCUMENT
:D:D:D:D
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WAITING...............REKO
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Im w8ing 2.
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Guys how come in the grade thresholds it says A* is not included? :S My sister got an A*
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For individual components there is no A*
A* is for both the coursework and the paper
got it if so plzzz + rep mee :)
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Yup thanks, I'll rep you once I find out what that is and how to do it lol I'm new here
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what is check digit check? (3mrks) , n what is pseudocode? (is it same as algorithms, if not wat is the difference?) saw it in past paper but now duno where...
thx in advance
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who - repped me :@:@
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hey guys sorry for the delay i am still typing, i only need a maximum of one hour
thanks and i hope it helps :D
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check digit.....an extra digit at the end of code whichncan be used for checking accuracy and control purposes.
there are two ways of check digit
by the sum of the code.
and the most popular check digit system ....modules11 check digit system. eg isbn( international standard book number) on the book.
tht all i know......
pseudocode.....it is another programming analysis tool,which is used for planning program logic.these pseudocode used english phrases and are not understood by the computer.
advantage.....it is problem oriented ie the programmer think in related to her problem rather than in term of machine.
pseudocode doesnt have any syntax rules for formulating instruction.
i hop tht helps :)
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HOW DO WE KNOW WHEN 2 WRITE INPUT....BEFORE THE LOOP OR AFTR DA LOOP????IN AN ALGO ::) ::) :o
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HOW DO WE KNOW WHEN 2 WRITE INPUT....BEFORE THE LOOP OR AFTR DA LOOP????IN AN ALGO ::) ::) :o
USUALLY it is after but depends on your algo
yo man check the doc, i mad a topic for it :D
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DUDE.........UR DOC CONTAINS MR.MANSOORS NOTES U COPIED... ;D ;D ;D
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where the Doc???
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Mr.Mansoor?!
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CActus: NO THE DEFINITIONS ARE FROM ANOTHER SOURCE AND THE QUESTIONS AND THEIR ANSWERS ARE SOME OF MANSOORS NOTES but not all -_-
IGCSE BOY THEY ARE ON A SEPERATE TOPIC :D
SWEETSH, MR.MANZOOR A TEACHER HERE IN RIYADH :D
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I cannot open the document kindly helpp!!!!
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Pilot implementation is running the system, to check that it meets all the requirments, and then implementing it to the business
NOTE: stick to parralel running and direct changeover ( since they are the easiest)
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Pilot implementation is running the system, to check that it meets all the requirments, and then implementing it to the business
NOTE: stick to parralel running and direct changeover ( since they are the easiest)
met7ames :P haha
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can u kindly answer the following questions
state the ways in which procedures can help a programmer?
the new computerised system has been installed.describe the ways in which the training of staff to use the new system might be done?
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another question what reason should i write on
why program documentation is provided?
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state the ways in which procedures can help a programmer?
Procedures could be used by many different programmers without the need of it to be rewritten
the new computerised system has been installed.describe the ways in which the training of staff to use the new system might be done?
by using CAL ( computer aided learning) or by the use of CBL ( computer based Learning)
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why program documentation is provided?
to help developing in carrying out future maintenanace and modification to the system, it includes program flow charts
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i +rep you :)
can u give another way of procedure helping programmer
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procedures could be inserted or deleted easily
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1) procedures can be recalled during any part of the program elliminating the need for them to be rewritten everytime.
2) procedures can be stored in the library of procedures and then shared by many programmers
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thanx!!!!
another question......
describe electronic scabbing with example.
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WAT DA HELL DA THREAD IS DELETED!!!!!!
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All u've got to write is the definition...
Electronic scabbing is the switching by managers of wrd processing and computer processing duties from striking staff in one location to non-striking staff in another. It's a misuse of computer power for financial gain . Form of electronic fraud
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Electronic scabbing refers to the practice used by managers and other executives when computer networks are used to transfer electronic documents to the non transferring or receiving system.
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I guess Adi's one is rite too, but I learnt mine frm the mark scheme definitions. So, u'd prbbly be more sure that Cambridge accepts it. No offense meant though, Adi...
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can any one do the algo 4 n2004
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thanx!!!!.....
catus which thread are u talking abt?
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Algorithm Question Nov '04
Input StrtStation,DestStation, Passengers
If StrtStation and DestStation are any integer value from 1 to 10 Then
Stations Travelled = DestStation-StrtStation
Fare = $2 * Stations Travelled * Passengers
If Passengers>= 3 Then
Fare = 90% * Fare
End if
Print "Fare = " ,Fare
Else
Print "Invalid Station Numbers"
End if
Input money received from customer
Change = money received from customer-Fare
Output change
Print Tickets
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rekomekos thread"a\has any one done there computer paper yey?"
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rekomekos thread"a\has any one done there computer paper yey?"
my exam is in a 11 hrs 19 min , hahahaah, gd luck everyone
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rekomekos thread"a\has any one done there computer paper yey?"
it is deleted as we are allowed to discussed until 24 hrs after the paper is over
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omg!! I just hate that shitty rule, :@
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another question.......
computer are used to contol the landing of aeroplane. describe the inputs, processing, and output needed for a computer controlled landing.
(6 mark)
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plzzzz.....ayone answer atleast in brief!!!!
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loool....sorry!
i hate these questions! Anyways, here's the answer i made up...which is prbbly what i'd do in the exam... dont u have the mark scheme? wat yr?
Computer-controlled Aeroplane Landing System
Input:Altitude,Runway length,present aeroplane speed, distance from destination,timings for other flights' landing, weather conditions, signals from ground station.
Process: Validates data received, decides weather weather is suitable for landing, calculates suitable runway speed,c0-ordinates landing time with other flights and decides if runway will be free, calculates time at which descent must start
Output: Opens wheels when close enuff to ground, automates descent process at appropraite time, turns on passenger safety signs ( seat belt, lavatory, etc.) in cabin at appropriate time, sends signals to ground station, adjusts cabin temperatures/pressure for landing ?!?
looooooool.....dont laugh sarah!
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another question.......
computer are used to contol the landing of aeroplane. describe the inputs, processing, and output needed for a computer controlled landing.
(6 mark)
i think, im not so sure
input: height of plane, speed, maybe air pressure,position of plane
processing: slow down plane, lower the height, give commands to open wheels, and apply brakes when landed ( to stop plane)
output: speed reduced, wheelss opened, plane lowers height and touches ground, brakes applied and therefore plan lands succesfully and stops
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i dont have the marhscheme for 1998, this quest is from this 1998......
anyway, than, i +rep u!!!!
by the way, muslimah, obviously i will not laughing, as u r my teacher ;) i have to respect you!!!! BRILLIANT ANSWER!!!!
wow, u know my name!!!!(perhaps from email?)
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can any one do the algo 4 n2004
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can any one do the algo 4 n2004
i think muslimah93 did it before in one of the previos pages!!!
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i dare anyone to solve da algo 4 n1997!!!!!!!1
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i dont have the marhscheme for 1997, this quest is from this 1997......
anyway, than, i +rep u!!!!
by the way, muslimah, obviously i will not laughing, as u r my teacher ;) i have to respect you!!!! BRILLIANT ANSWER!!!!
wow, u know my name!!!!(perhaps from email?)
lol...yh...i saw it frm ur email ID. thanx! JUst hope they dunt ask us sumthing too weird and hard tomorrow! I didnt get arnd to solving the 97 papers. Anyway, hopefully they wont go that far back. Hope we all do well. Insha'Allah... Im going to go and try to sleep. Need good and imaginative "making-up answers" functions tomorrow! lol......gud nite!salaam!
P.S. I suggest u go to sleep soon too sarah. Listen to ze teacher....lolz.
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i am left alone!!!!!!!! :'( :'( :'( :'( :'( :'( :-* :-*
all r giving exams in manarat??????
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Good Night!!!! and best of luck!!!!
and teacher, i know u will score full marks!!!!!! Inshallah!!!!!
p.s./ ya even me i dont wanna this typa ques input output and processing!!!! uffffff..........
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lol................i meant q 11
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i dare anyone to solve da algo 4 n1997!!!!!!!1
haahha ohh sh*t ... anywayz
Set Min= 100
Set Max= 0
Set total= 0
Repeat
Input mark
Case of
Mark lower than min, mark =min
Mark greater than max, mark=max
Add mark to total
Otherwise
Invalid mark
Add 1 to Count
End Case
Untill Count = 30
Average= total/30
Print Average
Print Min
Print Max
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gud..........but wrs da variable 4 counting 30 students.......
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gud..........but wrs da variable 4 counting 30 students.......
Repeat
Input mark
Case of
Mark lower than min, mark =min
Mark greater than max, mark=max
Add mark to total
Otherwise
Invalid mark
End Case
Untill Count = 30
i have done a repeat loop, when i set count=0,, then at the bottom i wrote untill count =30 ( which are the 30 marks inputed)
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my way is different 4rm u buy da logic is da same
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ayt anywayz, im off. i need to get some sleep, cuz om el mishwarr an exam which is 2:30 hrs, peace
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ayt anywayz, im off. i need to get some sleep, cuz om el mishwarr an exam which is 2:30 hrs, peace
best of luck!!!!!!!!!!!!
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BEST OF LUCK EVERYBODY!!!!!!!!!!
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Hope we all do well Insha'Allah! Umm, cactus and Wayne, ur algorithm had a litlle problem. U have to increment the count within the loop. Like after the endcase. u must write " count= count +1 " because otherwise the count will never become 30!....lol.
I thought u were speaking of the other '97 algorithm for the 20 and 10 dollar notes. That's harder...
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Just came back home from exam : )
Finished early so we could go early.
Dont ask me about what was on it etc, its CHEATING.
If you didn't take it yet and you're here.
and we can't talk about it for the next 24 hours right? mm..
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r u online!!!!!!!!!!! in msn mini
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yo please just tell us, was it hard and the algorithm question what was the topic, cmn pls, it aint cheating! :)
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yeah!!
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i think he didnt give da exam yet???
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is algorithm n pseudocode different? if so , can u give me an eg of both??
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argao, Pseudocode is PART of algorithms
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Just came back home from exam : )
Finished early so we could go early.
Dont ask me about what was on it etc, its CHEATING.
If you didn't take it yet and you're here.
and we can't talk about it for the next 24 hours right? mm..
minikaoru stop bullshitting alright, and dont try to make ppl scared by saying the algo was hard
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errr, I never said anything and never said algo was hard.
I'm not commenting on the exam.
And dude, I am not bullshitting on anything. If you think I am then think that way.
People don't ask me if I got the question or anything related (whoever is messaging) cause I can't tell you. SORRY.
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@MINI just tell can we do the paper in time and every question plzzzzzzzzzzzzz
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I had time to finish all the question in time and most of us finished early.
Most of student left early like 40-30 min before. I finished about 30min before.
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Can u plz just tell us the number of pages.
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Can u plz just tell us the number of pages.
Err, can't remember. Look at the past paper.
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Can u plz just tell us the number of pages.
Err, can't remember. Look at the past paper.
buddy there is no way u finished the exam.. i dont really think so! this guy is probably lieing.. not sure though :P
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Can u plz just tell us the number of pages.
Err, can't remember. Look at the past paper.
buddy there is no way u finished the exam.. i dont really think so! this guy is probably lieing.. not sure though :P
I'm not lying. Why do you think so? And why would I lie in the first place D:
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nvm, sorry...
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I had time to finish all the question in time and most of us finished early.
Most of student left early like 40-30 min before. I finished about 30min before.
i just finished the exam!!!!!it was incredibly easy!!!!AMAZING....FATABULOUS.....LUVED IT :D :D ;D ;D ;) ;) :)
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thought it was tougher than most of the other past papers...
longer than others too, though finished early...
20 pages.
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Aren't we supposed to wait 24 hours or something?
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did paper
harder than expected
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Supporse to wait 24 hoursss. Rightt?
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I didnt reveal anything.
I just said that i found it harder than other papers ive done
also, i said the length of the paper - we all no dat.
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@magician
agreed...it was hard and lengthy
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they asked all irrelevent questions!!!!!!!!!!!!!!!!
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hey guys,
as many of u know, in the forums we only discuss exams 24 hours after theyr'e done,
thanks :)
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q80boy just chilllllllllllll dude......
we know da rules................which r meant 2 be broken!!!!!!!!!!!!! heheh :P :P :P :P :P :P :P :P :D :D :D ;)
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aam chillin dude :P
it's just a reminder ;)
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very nice exam, a little hard though
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the exam wz sooo freakin EASY...... :D :)