Daily Practice · GCSE Computer Science

Daily Practice - GCSE Computer Science

Systems, data representation, networks, algorithms and programming.

5th February 2025

5 questions · GCSE · 123 questions in this band

1
Data Representation: Images, Sound and Compression
An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
2
Programming Practice: Writing and Refining Programs
A programmer wants any syntax error in their program to be reported before the program starts running at all. State whether a compiler or an interpreter behaves this way, and explain why.
3
SQL and Data Handling
Define the term 'primary key' as used in a database table.
4
Trace Tables and Binary/Hex Conversions
State how many different values can be represented using 5 bits, and explain your reasoning.
5
Systems Architecture
Two CPUs are compared for a task optimised for multiple cores: CPU A has 2 cores at 4.2 GHz; CPU B has 6 cores at 3.0 GHz. Explain which CPU is likely to perform better for this task.

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