Identifying Errors (CIE IGCSE Computer Science)

Topic Questions

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Medium

4 marks

An algorithm has been written in pseudocode to input some numbers. It only outputs any numbers that are greater than or equal to 100. The number 999 is not output and stops the algorithm.

INPUT Number
WHILE Numbers <> 999 DO
IF Number > 100
THEN
OUTPUT Number
ENDIF
ENDWHILE
OUTPUT Number

Identify the four errors in the pseudocode and suggest corrections.

Error 1 .............................................................

Correction ......................................................

Error 2 ..............................................................
Correction .......................................................

Error 3 ..............................................................
Correction .......................................................

Error 4 ..............................................................
Correction .......................................................

[4]

How did you do?

2 marks

Write a pseudocode statement to change the corrected algorithm to output all numbers between 100 and 200 inclusive.

You do not need to rewrite the whole algorithm

[2]

How did you do?

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Name[1]	Name[2]	Name[3]	Name[4]
Jamal	Amir	Eve	Tara

Flag	Count	Name[1]	Name[2]	Name[3]	Name[4]	Temp
		Jamal	Amir	Eve	Tara

A	file	$box enclose space space space end enclose$
B	function	$box enclose space space space end enclose$
C	parameter	$box enclose space space space end enclose$
D	process	$box enclose space space space end enclose$

Value	Diff1	Diff2	OUTPUT