IGCSE Computer Science Paper 2 Word Scramble: 8.1c Procedures and Functions and 8.2 Arrays (Modules 439–448)
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Word scramble
Unscramble the letters and write each key term on the line.
1
NLESGI ITONP FO NCEGAH
Code kept in one subroutine is edited once, so every CALL gets the update. Repeated copies must each be changed, and missing one gives inconsistent results.
2
RADOLMU ARMPRGO
A program split into small named subroutines. Each one can be tested alone and read quickly, so errors are easier to find and the whole program is easier to understand.
3
IBFNTEE EUBSCEA SONREA
A full maintenance answer names a benefit of subroutines, such as one place to change, then uses because to give the reason, ideally with an example from the program, not just 'it is easier'.
4
TSRNURE
Keyword in a FUNCTION header giving the data type of the value sent back, e.g. FUNCTION Area(r : REAL) ______ REAL. End with ENDFUNCTION. Never use CALL for a function.
5
YRAAR
An ______ stores many values of the same type under one name, so you need one ______ instead of many variables. An index reaches each value, and loops can process them all.
6
01YAA[3:RR]
In ARRAY[l:u], l is the lower bound (index of the first element) and u is the upper bound (index of the last). Here the lower bound is 1 and the upper bound is 30.
7
RYA1A[3:0R] FO EIEGRTN
An array has a fixed size set when it is declared, and every element must be the same data type, so STRING and INTEGER cannot be mixed in one array.
8
10ARA[R:Y1] FO GTEIENR
The data type after OF decides what every element can hold. ______ holds ten whole-number scores; REAL, CHAR, STRING or BOOLEAN would hold other kinds of data.
Answer Key
IGCSE Computer Science Paper 2 · Modules 439–448
1NLESGI ITONP FO NCEGAH → single point of change — Code kept in one subroutine is edited once, so every CALL gets the update. Repeated copies must each be changed, and missing one gives inconsistent results.
2RADOLMU ARMPRGO → modular program — A program split into small named subroutines. Each one can be tested alone and read quickly, so errors are easier to find and the whole program is easier to understand.
3IBFNTEE EUBSCEA SONREA → benefit because reason — A full maintenance answer names a benefit of subroutines, such as one place to change, then uses because to give the reason, ideally with an example from the program, not just 'it is easier'.
4TSRNURE → RETURNS — Keyword in a FUNCTION header giving the data type of the value sent back, e.g. FUNCTION Area(r : REAL) RETURNS REAL. End with ENDFUNCTION. Never use CALL for a function.
5YRAAR → ARRAY — An array stores many values of the same type under one name, so you need one array instead of many variables. An index reaches each value, and loops can process them all.
601YAA[3:RR] → ARRAY[1:30] — In ARRAY[l:u], l is the lower bound (index of the first element) and u is the upper bound (index of the last). Here the lower bound is 1 and the upper bound is 30.
7RYA1A[3:0R] FO EIEGRTN → ARRAY[1:30] OF INTEGER — An array has a fixed size set when it is declared, and every element must be the same data type, so STRING and INTEGER cannot be mixed in one array.
810ARA[R:Y1] FO GTEIENR → ARRAY[1:10] OF INTEGER — The data type after OF decides what every element can hold. ARRAY[1:10] OF INTEGER holds ten whole-number scores; REAL, CHAR, STRING or BOOLEAN would hold other kinds of data.