Computer Science · May / June 2022 · Paper 21 · Question 4
0478
As printed in the paper
The question as text
The flowchart shows an algorithm that should allow 60 test results to be entered into the variable Score. Each test result is checked to see if it is 50 or more. If it is, the test result is assigned to the Pass array. Otherwise, it is assigned to the Fail array.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
4(a)[6]
One mark per mark point, max six
MP1
input box
MP2
correct check of Score
MP3
assign Score to Pass correctly
MP4
assign Score to Fail correctly
MP5
increment both array counters
MP6
correct check of number of scores
START
PassCount ← 0
FailCount ← 0
Count ← 0
INPUT
Score
Yes
No
IS Score >=
50?
Pass[PassCount] ← Score
Fail[FailCount] ← Score
PassCount ← PassCount + 1
FailCount ← FailCount + 1
Count ← Count + 1
No
IS Count =
60?
Yes
END
4(b)[4]
One mark per mark point, max four
MP1
appropriate conditional loop structure
MP2
correct identification of invalid input
MP3
appropriate error message
MP4
repeated input of score until correct
WHILE Score < 0 OR Score > 100 (DO)
OUTPUT "Your entry must be between 0 and 100, inclusive, please try again "
INPUT Score
ENDWHILE
Or:
REPEAT
IF Score < 0 OR Score > 100
THEN
OUTPUT "Your entry must be between 0 and 100, inclusive, please try again " INPUT Score
ENDIF
UNTIL Score >= 0 AND Score <= 100
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