Daily Practice · GCSE Computer Science

Daily Practice - GCSE Computer Science

Systems, data representation, networks, algorithms and programming.

20th February 2026

5 questions · GCSE · 123 questions in this band

1
Data Representation: Images, Sound and Compression
A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
2
Programming Practice: Writing and Refining Programs
A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.
3
SQL and Data Handling
Give one advantage of a relational database over a flat-file database.
4
Trace Tables and Binary/Hex Conversions
Convert the denary number 200 to hexadecimal, showing your working.
5
Systems Architecture
State the three stages of the fetch-decode-execute cycle in the order they occur.

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