A-LevelComputer ScienceHardware9618/22 · Oct/Nov 2022 · Q54 Marks

5 Examine the following pseudocode. IF A = TRUE THEN IF B = TRUE THEN IF C = TRUE THEN CALL Sub1() ELSE CALL Sub2() ENDIF ENDIF ELSE IF B = TRUE THEN IF C = TRUE THEN CALL Sub4() ELSE CALL Sub3() ENDIF ELSE IF C = FALSE THEN CALL Sub3() ELSE CALL Sub4() ENDIF ENDIF ENDIF A programmer wants to re-write the pseudocode as four separate IF...THEN...ENDIF statements, each containing a single CALL statement. This involves writing a single, simplified logic expression as the condition in each statement. Write the amended pseudocode. 1 2 3 4

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2022). The mark or mark type is shown in brackets.

[4] One mark per IF...THEN...ENDIF clause: 1 IF A AND B AND C THEN CALL Sub1() ENDIF 2 IF (A AND B) AND NOT C THEN CALL Sub2() ENDIF 3 IF (NOT A) AND (NOT C) THEN CALL Sub3() ENDIF 4 IF (NOT A) AND C THEN CALL Sub4() ENDIF

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Topic: Hardware, A-Level Computer Science (syllabus 9618). Structured question, 4 marks.
Source: A-Level Computer Science, Oct/Nov 2022 Paper 2 Variant 2, question 5.

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