O-LevelComputer ScienceAlgorithm design and problem-solving2210/22 · Oct/Nov 2017 · Q44 Marks

IF ... THEN ... ELSE ... ENDIF is one type of conditional statement used when writing pseudocode. Identify and describe another type of conditional statement that you could use when writing pseudocode. Give a reason why you would use this type of conditional statement. Conditional statement Description Reason

IF ... THEN ... ELSE ... ENDIF is one type of conditional statement used when writing pseudocode. Identify and describe another type of conditional statement that you could use when writing pseudocode. Give a reason why you would use this type of conditional statement. Conditional statement Description Reason[4]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2017). The mark or mark type is shown in brackets.

2 marks for identification, 1 mark for description, 1 mark for reason.
Identification: CASE ... OF ... (OTHERWISE) ... (ENDCASE) or ... OF ... (OTHERWISE) ... ENDCASE
Description: a statement that allows for multiple selections // not any of the above
Reason: to simplify pseudocode/ make pseudocode more understandable etc.

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Topic: Algorithm design and problem-solving, O-Level Computer Science (syllabus 2210). Structured question, 4 marks.
Source: O-Level Computer Science, Oct/Nov 2017 Paper 2 Variant 2, question 4.

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