Computer Science · May / June 2021 · Paper 21 · Question 1

Many correct answers. They must be meaningful and related to Task 1. The names are examples only.

One mark per mark point

MaxCandidates

4

The value of the maximum number of candidates for the election

Many correct answers. They must be meaningful and related to Task 1. The names are examples only.

One mark per mark point

NumberCandidates

Storing the number of candidates in the election (for a tutor group)

CandidateNames

Storing the names of the candidates for the election

One mark per mark point (Max 4)

MP1

Change the value of the MaxCandidates constant/variable to 8

MP2

Change the input message to state the maximum number of candidates is 8 …

MP3

…how your program changed the input message

MP4

Change the loop limit to up to 8 …

MP5

…how your program changed the loop limit

MP6

Change the validation to allow input up to 8 …

MP7

…how your program changed its validation check

MP8

Change the array size(s) to ensure sufficient capacity to store up to 8 names …

MP9

…how your program changed the array sizes

MP10

Change the counters to ensure votes can be counted for up to 8 candidates …

MP11

…how your program changed its counters

Any five from:

MP1

Input with message to enter unique voter number

MP2

Validation of (unique) voter number entered e.g. length check/type check/range check

MP3

Attempt to check if voter number input is in list of possible voters

MP4

Attempt to check if they have already voted

MP5

If voter has already voted, message to warn them they can’t vote

MP6

Attempt at preventing them from voting

MP7

Store voter number in a suitable data structure

Example answer

OUTPUT "Please enter your unique voter number"

INPUT UniqueVoterNumber

FoundFlag ← False

AllNumbersChecked ← False

Counter ← 0

WHILE FoundFlag = False AND AllNumbersChecked = False

IF StudentNumbers[Counter] = ""

THEN

AllNumbersChecked = True

StudentNumbers[Counter] ← UniqueVoterNumber

ELSE

IF UniqueVoterNumber = StudentNumbers[Counter]

THEN

FoundFlag = True

PRINT “Sorry, you have already voted”

ELSE

Counter = Counter + 1

ENDIF

ENDIF

ENDWHILE

IF FoundFlag = False

THEN

OUTPUT "Please enter the code of your chosen candidate"

INPUT Vote

ENDIF

Explanation of how the program does the following:

Any four from:

MP1

Find out how many votes in total (for all candidates) were cast in the election.

MP2

For each candidate

MP3

… calculate the percentage of votes

MP4

… excluding abstentions.

MP5

Display the name of each candidate, the number of votes and the percentage of votes they received with appropriate messages.

MP6

Display the number of votes cast and the number of abstentions with appropriate message.

Section B