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Procedures, Functions, Arrays and File Handling: Question 7

Syllabus 8.1

Multiple choice 1 mark

An online coding bootcamp uses a function, IsPassMark, to check whether a learner's score on a short quiz meets the pass mark required for that particular module.

FUNCTION IsPassMark(Score : INTEGER, PassMark : INTEGER) RETURNS BOOLEAN
    IF Score >= PassMark
        THEN
            RETURN TRUE
        ELSE
            RETURN FALSE
    ENDIF
ENDFUNCTION

DECLARE Result1 : BOOLEAN
DECLARE Result2 : BOOLEAN
Result1 ← IsPassMark(48, 50)
Result2 ← IsPassMark(72, 50) AND IsPassMark(72, 70)
OUTPUT Result1
OUTPUT Result2

What is displayed, in order, by the two OUTPUT statements above?

Choose an answer to check it, then compare with the worked solution below.
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Worked solution

Step 1: Trace Result1 ← IsPassMark(48, 50)

Score = 48, PassMark = 50. Is 48 >= 50? No, so the ELSE branch runs: RETURN FALSE.

Result1 ← FALSE.

Step 2: Trace Result2 ← IsPassMark(72, 50) AND IsPassMark(72, 70)

Both function calls must be evaluated before the AND can be applied:

  • IsPassMark(72, 50): Score = 72, PassMark = 50. Is 72 >= 50? Yes, so RETURN TRUE.
  • IsPassMark(72, 70): Score = 72, PassMark = 70. Is 72 >= 70? Yes, so RETURN TRUE.

Result2 ← TRUE AND TRUE = TRUE.

Step 3: Read off the two OUTPUT statements

OUTPUT Result1 displays FALSE. OUTPUT Result2 displays TRUE.

Displayed, in order: FALSE then TRUE, option B.

Final answer

  • Result1 = FALSE, Result2 = TRUE
  • Displayed, in order: FALSE then TRUE, option B