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A-LevelComputer ScienceString ManipulationMay/June 2024Paper 2 Q610 Marks

A music player stores music in a digital form and has a display which shows the track being played. (a) Up to 16 characters can be displayed. Track titles longer than 16 characters will need to be trimmed as follows: • Words must be removed from the end of the track title until the resulting title is less than 14 characters. • When a word is removed, the space in front of that word is also removed. • Three dots are added to the end of the last word displayed when one or more words have been removed. The table below shows some examples: | Original title | Display string | |------------------------|--------------------------------------------| | | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | | Bat out of Hull | B a t o u t o f H u l l | | Bohemian Symphony | B o h e m i a n . . . | | Paperbook Writer | P a p e r b o o k W r i t e r | | Chris Sings the Blues | C h r i s S i n g s . . . | | Green Home Alabama | G r e e n H o m e . . . | A function Trim() will: • take a string representing the original title • return the string to be displayed. Assume: • Words in the original title are separated by a single space character. • There are no spaces before the first word or after the last word of the original title. • The first word of the original title is less than 14 characters.

📋 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 String Manipulation in A-Level Computer Science (syllabus code 9618). It is worth 10 marks.

Source

This question appeared in the Cambridge A-Level Computer Science May/June 2024 examination, Paper 2 Variant 2.

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