ZIMSEC A-Level Computer Science
1Data Representation
Data Representation in ZIMSEC A-Level Computer Science: what the syllabus expects you to know, the learning objectives and how to practise.
Topic114 practice questions5 lessons
Overview
Form 5 (competency matrix 8.1). Paper 1 weighting 15%.
In this topic
Lessons
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Negative binary integers and binary arithmetic
50 min
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Number systems: binary, denary, hexadecimal, octal and BCD
45 min
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Floating-point real numbers: mantissa and exponent
55 min
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Computer arithmetic errors: overflow, underflow and rounding
45 min
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Character sets: ASCII, extended ASCII, Unicode and EBCDIC
40 min
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Sample question
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