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Daily Practice · GCSE Computer Science

May 2023 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in May 2023, with answers. Systems, data representation, networks, algorithms and programming.

← Today's GCSE Computer Science sheet

May 2023

31 sheets · 155 questions · GCSE

May 2023 compilationAll answers

Every sheet in May 2023

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

  1. 1st May 2023A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  2. 2nd May 2023A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  3. 3rd May 2023A streaming company records which shows each user watches and uses this to recommend similar shows. Explain one ethical concern this could raise, even if the company only uses the data to improve recommendations.
  4. 4th May 2023State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  5. 5th May 2023State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  6. 6th May 2023Give one example of an optical secondary storage device.
  7. 7th May 2023Give two reasons why network communication is divided into layers.
  8. 8th May 2023State the term used for realistic data that a program would be expected to handle during normal use.
  9. 9th May 2023Define the term 'primary key' as used in a database table.
  10. 10th May 2023State the difference between lossy and lossless compression.
  11. 11th May 2023State the condition that must be met before a binary search can be used on an array.
  12. 12th May 2023A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
  13. 13th May 2023Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  14. 14th May 2023Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  15. 15th May 2023Explain why an interpreter is often preferred while a program is being written.
  16. 16th May 2023Convert the denary number 45 to hexadecimal.
  17. 17th May 2023What does the acronym CPU stand for?
  18. 18th May 2023State what the term malware means.
  19. 19th May 2023A 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.
  20. 20th May 2023An uncompressed file is 6000 KB. After lossless compression it is 1500 KB. Calculate the compression ratio in the form n:1 (original size : compressed size).
  21. 21st May 2023Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  22. 22nd May 2023Which piece of UK legislation controls how organisations must store and use people's personal data?
  23. 23rd May 2023Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  24. 24th May 2023A 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.
  25. 25th May 2023Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  26. 26th May 2023State the layer that IP operates in, and describe its job.
  27. 27th May 2023A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  28. 28th May 2023A 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;
  29. 29th May 2023State one function carried out by the operating system of a computer.
  30. 30th May 2023In computational thinking, what is meant by the term 'decomposition'?
  31. 31st May 2023Given A = 1 and B = 1, state the value of A AND B.