CA Ch2 - Data Control and Data Organisation

Explore how data is controlled, validated, and organised within information systems.

1. Error Type

Learn to identify the three types of data errors: Data Source, Transcription, and Transposition.

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2. Data Validation

Learn how validation checks are used to control the quality of data entered into a system.

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3. Data Verification

Learn the difference between data validation and verification, and identify common validation checks.

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4. Database Indexing

Understand how indexing helps databases locate records quickly.

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5. File Access Mode

Understand how systems read and write records using different file access methods.

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