Computer Science · May / June 2024 · Paper 21 · Question 2
0478
As printed in the paper
The question as text
Four descriptions of programming concepts and five programming concepts are shown.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
2(a)[4]
One mark for each correct line
Description Programming concept
function
a subroutine that may not return a value
procedure
a value that is declared and used within
a specific procedure
parameter
a value that a procedure expects you to
supply when it is called
global variable
a subroutine that will always return a
local variable
value
2(b)[2]
One mark per mark point
Correct key word - CALLProcedure name with correct parameters - Average(25, 50)CALL Average(25, 50)
2(c)[3]
One mark per mark point, max three
Procedures / functions divide the program into smaller manageable segments… making it more readable / easier to understand / easier to debugProcedures / functions with meaningful names help to provide documentation for the program / enable/help/provide abstractionProcedures and functions may be re-used (in the program / in other programs / as part of a library) / run from a single lineProcedures and functions can reduce / eliminate (repeated) code
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