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Daily Practice · GCSE Computer Science

August 2023 - GCSE Computer Science 5-a-day

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

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August 2023

31 sheets · 155 questions · GCSE

August 2023 compilationAll answers

Every sheet in August 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 August 2023State the three stages of the fetch-decode-execute cycle in the order they occur.
  2. 2nd August 2023State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  3. 3rd August 2023Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  4. 4th August 2023Define the term 'pixel'.
  5. 5th August 2023Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  6. 6th August 2023Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  7. 7th August 2023Evaluate the expression 23 DIV 4.
  8. 8th August 2023A 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.
  9. 9th August 2023A 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.
  10. 10th August 2023Name the four layers of the TCP/IP model in order from the one closest to the user.
  11. 11th August 2023A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  12. 12th August 2023A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  13. 13th August 2023A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  14. 14th August 2023An 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.
  15. 15th August 2023Complete: NOT 0 = ?
  16. 16th August 2023Convert the denary number 39 to an 8-bit binary number, showing your working.
  17. 17th August 2023State what LAN stands for.
  18. 18th August 2023A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
  19. 19th August 2023An 8-bit register stores the value 01100000 (denary 96). State the resulting 8-bit binary value after a left shift by 1 place, and state whether an overflow occurs.
  20. 20th August 2023Which CPU register holds the address of the next instruction to be fetched?
  21. 21st August 2023Distinguish between the network security threats known as phishing and pharming.
  22. 22nd August 2023An array named temps holds 12 values. State the index of the first item and the index of the last item.
  23. 23rd August 2023A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  24. 24th August 2023A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  25. 25th August 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.
  26. 26th August 2023State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  27. 27th August 2023Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  28. 28th August 2023Give one example of an optical secondary storage device.
  29. 29th August 2023State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  30. 30th August 2023State the term used for realistic data that a program would be expected to handle during normal use.
  31. 31st August 2023A table called members has fields memberId, firstName, lastName and joinYear. Write an SQL statement that adds a new record with memberId 12, firstName 'Priya', lastName 'Shah' and joinYear 2026.