Calculations: Converting between units and calculating data capacity requirements.
1.2.4 Data Representation
Numbers: Binary, Denary, and Hexadecimal conversions; Binary addition and shifts.
Characters: The use of binary codes (ASCII and Unicode) to represent characters.
Images: Pixels, metadata, colour depth, and resolution.
Sound: Sample rate, bit depth, and duration.
1.2.5 Compression
Purpose: Reducing file size to save storage space or transmission time.
Lossy vs Lossless: Understanding which method removes data and which preserves it perfectly.
Related Past Paper Questions
Year: 2023 (June)
The computer has Virtual Memory (VM). Describe how virtual memory is used when RAM is full.
Mark: [4]
Year: 2023 (June)
A student has a text document and an image file that need to be compressed. Identify the most suitable type of compression for the text document and justify your choice.
Mark: [3]
Year: 2022 (June)
Describe two differences between RAM and ROM.
Mark: [4]
Year: 2022 (June)
A user is considering upgrading the RAM in their computer. Explain how this upgrade could improve the computer's performance.
Mark: [2]
Year: 2021 (November)
Nina wants to transfer photos from a digital camera to an external secondary storage device. Identify the three common types of secondary storage Nina can choose from.
Mark: [3]
Year: 2021 (November)
State four characteristics of secondary storage devices that should be considered when choosing a device for a specific purpose.
Mark: [4]
Year: 2020 (Sample Paper)
Describe the purpose of ROM (Read Only Memory) in a tablet computer.
Mark: [2]
Year: 2020 (Sample Paper)
Explain why a computer system needs secondary storage.
Mark: [2]
Year: 2023 (June)
A digital image has a colour depth of 4 bits. State the maximum number of different colours that can be represented.
Mark: [1]
Year: 2022 (June)
Identify one advantage and one disadvantage of using Magnetic storage compared to Solid State storage.