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Daily Practice · GCSE Computer Science

December 2022 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in December 2022, with answers. Systems, data representation, networks, algorithms and programming.

← Today's GCSE Computer Science sheet

December 2022

31 sheets · 155 questions · GCSE

December 2022 compilationAll answers

Every sheet in December 2022

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

  1. 1st December 2022A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
  2. 2nd December 2022Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  3. 3rd December 2022Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  4. 4th December 2022State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  5. 5th December 2022A company backs up its files onto magnetic tape cartridges, each with a capacity of 3 TB. The company needs to back up 20 TB of data. Calculate the minimum number of cartridges needed.
  6. 6th December 2022State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  7. 7th December 2022Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  8. 8th December 2022Define the term 'primary key' as used in a database table.
  9. 9th December 2022Define the term 'interrupt' as used to describe a signal received by a CPU.
  10. 10th December 2022An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
  11. 11th December 2022Evaluate X = NOT A AND B when A = 0 and B = 1.
  12. 12th December 2022Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  13. 13th December 2022Give one advantage of a star topology compared with a mesh topology.
  14. 14th December 2022State why a program written in a high level language must be translated.
  15. 15th December 2022Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  16. 16th December 2022State the three stages of the fetch-decode-execute cycle in the order they occur.
  17. 17th December 2022State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  18. 18th December 2022Describe what a nested loop does when it processes a 2D array.
  19. 19th December 2022Define the term 'pixel'.
  20. 20th December 2022Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  21. 21st December 2022Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  22. 22nd December 2022Evaluate the expression 23 DIV 4.
  23. 23rd December 2022A 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.
  24. 24th December 2022A 1 TB hard disk drive costs 40 pounds. A 500 GB solid-state drive costs 60 pounds. Calculate the cost per gigabyte of each device, and state which is cheaper per GB. Use 1 TB = 1000 GB.
  25. 25th December 2022Give two reasons why network communication is divided into layers.
  26. 26th December 2022A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  27. 27th December 2022A 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;
  28. 28th December 2022A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  29. 29th December 2022An array contains [9, 2, 6], to be sorted using insertion sort. Show the state of the array after each new element has been inserted into its correct position.
  30. 30th December 2022Complete: NOT 0 = ?
  31. 31st December 2022Convert the 8-bit binary number 01011010 to denary.