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ZIMSEC A-Level Computer Science

1.4Data representation: character sets

Data representation: character sets in ZIMSEC A-Level Computer Science: what the syllabus expects you to know, the learning objectives and how to practise.
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Overview

Character sets ASCII, Unicode, BCD and EBCDIC. BCD encoding is taught with the number systems (concept acs.data.number-bases).

Learning objectives

What the syllabus expects you to be able to do.

  1. 1.4.1Represent data using the ASCII, Unicode, BCD and EBCDIC character sets.
  2. 1.4.2Convert text to binary codes using a character set.

Lessons

  • Character sets: ASCII, extended ASCII, Unicode and EBCDIC

    40 min

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Sample question

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

Data representation: character sets: sample question

1 mark

How many bits are needed to store the word HARARE in 7-bit ASCII?

Answer in bits.

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