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A-LevelComputer ScienceTesting and DebuggingMay/June 2021Paper 2 Q75 Marks

A procedure, FormatName(): • is called with a string containing words and spaces as its parameter. In this context, a word is any sequence of characters that does not contain a space character. • creates a new formatted string from this string with the following requirements: 1. Any leading spaces removed (spaces before the first word). 2. Any trailing spaces removed (spaces after the last word). 3. Any multiple spaces between words converted to a single space. 4. All characters converted to lower case. The FormatName() procedure has been written in a programming language and is to be tested using the black-box method.

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Computer Science Question

Topic

This structured question tests Testing and Debugging in A-Level Computer Science (syllabus code 9618). It is worth 5 marks.

Source

This question appeared in the Cambridge A-Level Computer Science May/June 2021 examination, Paper 2 Variant 2.

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