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Cambridge IGCSE Computer Science practice

Paper 1 structured question: Data storage and compression

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Data storage and compression

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Paper 1Computer Systems1 marks

File compression techniques are widely used in various applications.

Description

File Compression Overview

File compression is essential for efficient storage and transmission of data. There are two main types: lossy and lossless compression. Lossy compression reduces file size by permanently removing some data, while lossless compression reduces file size without losing any data.

  1. a

    State the two types of file compression.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 1 structured question: Data storage and compression

Paper 1Computer Systems4 marks

Description

Implications of Compression

Compression methods have significant implications for data quality and storage efficiency. Lossy compression is often used for media files where some quality loss is acceptable, while lossless compression is used for files where data integrity is critical.

  1. a

    Explain the difference between lossy and lossless compression.

    Aim for approximately 4 distinct marking points.

    [4]