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Daily Practice · GCSE Computer Science

April 2026 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in April 2026, with answers. Systems, data representation, networks, algorithms and programming.

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April 2026

30 sheets · 150 questions · GCSE

April 2026 compilationAll answers

Every sheet in April 2026

The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.

  1. 1st April 2026State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  2. 2nd April 2026A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  3. 3rd April 2026State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  4. 4th April 2026State the typical maximum capacity of a single-layer DVD.
  5. 5th April 2026Give two reasons why network communication is divided into layers.
  6. 6th April 2026State what is meant by a syntax error.
  7. 7th April 2026Define the term 'primary key' as used in a database table.
  8. 8th April 2026What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  9. 9th April 2026Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  10. 10th April 2026Given P = 0 and Q = 1, state the value of P OR Q.
  11. 11th April 2026Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  12. 12th April 2026A network administrator is connecting 10 computers in a server room. Calculate the number of cables needed for a full mesh topology, and state the number needed for a star topology with one central switch.
  13. 13th April 2026Explain why an interpreter is often preferred while a program is being written.
  14. 14th April 2026Convert the 4-bit binary number 1101 to denary.
  15. 15th April 2026Two 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.
  16. 16th April 2026State why an organisation might employ penetration testers to test its network.
  17. 17th April 2026A 2D array grid is declared as grid[4][6]. State how many rows and columns it has and how many elements it holds in total.
  18. 18th April 2026State one example of a file format that commonly uses lossy compression.
  19. 19th April 2026State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  20. 20th April 2026State whether the source code of proprietary (closed source) software is normally available for the public to view.
  21. 21st April 2026Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  22. 22nd April 2026A 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.
  23. 23rd April 2026Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  24. 24th April 2026State the layer that IP operates in, and describe its job.
  25. 25th April 2026Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  26. 26th April 2026A table called staff has fields staffId, name, department and salary, storing these records: staffId | name | department | salary, 1 | Ben | Sales | 24000, 2 | Chloe | IT | 31000, 3 | Dan | Sales | 27000. State which staffId(s) would be returned by: SELECT staffId FROM staff WHERE department = 'Sales' AND salary > 25000;
  27. 27th April 2026Each pair from the previous question is stored using 2 bytes. Calculate the compression ratio achieved, given the uncompressed row (1 byte per pixel) uses 8 bytes.
  28. 28th April 2026Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  29. 29th April 2026State the two values a Boolean data type can hold.
  30. 30th April 2026Convert the 8-bit binary number 01011010 to denary.