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ZIMSEC A-Level Computer Science

1.3Computer arithmetic errors

Computer arithmetic errors in ZIMSEC A-Level Computer Science: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic23 practice questions1 lesson

Learning objectives

What the syllabus expects you to be able to do.

  1. 1.3.1Distinguish overflow from underflow and say when each arises.
  2. 1.3.2Interpret arithmetic errors and explain their effect on results.

Lessons

  • Computer arithmetic errors: overflow, underflow and rounding

    45 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Computer arithmetic errors: sample question

1 mark

The number 0.35 is stored in a computer as 0.34375. What is the absolute error?

Only if the answer has a unit, e.g. cm or km/h.

Turn Computer arithmetic errors into a strength.

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