Data Representation

Overview

Framework:
Access to HE 2024
Level:
Level 3
Unit No:
Not available
Credits:
3
Guided learning hours:
Not available

Qualification Grading Type

Graded

For the full unit details, please download the latest version of the qualification specification. This is available for download on the relevant qualifications page.

Unit Learning Outcomes

To view the assessment criteria and any additional content, please expand the relevant learning outcome below.

1. — Understand data numeral systems.

Assessment Criteria

  • 1.1.

    Explain the types of data numeral systems used in computing.

2. — Be able to use data numeral systems in practical applications.

Assessment Criteria

  • 2.1.

    Perform operations involving data numeral systems.

  • 2.2.

    Use twos complement to test for overflow in a computer system.

  • 2.3.

    State and implement the algorithm to perform an arithmetic operation involving normalised floating points.

3. — Understand representation of text, images and sound.

Assessment Criteria

  • 3.1.

    Explain how coding, including ASCII and Unicode, are used to represent text.

  • 3.2.

    Explain how pixels and metadata are used to represent images including coloured images.

  • 3.3.

    Explain how the quality of an image can be affected by the resolution of the image

  • 3.4.

    Explain how sampling is used in the process of representing sound.

  • 3.5.

    Explain compression of data and how it is processed.