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Daily Practice · GCSE Computer Science

January 2023 - GCSE Computer Science 5-a-day

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

← Today's GCSE Computer Science sheet

January 2023

31 sheets · 155 questions · GCSE

January 2023 compilationAll answers

Every sheet in January 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 January 2023State what LAN stands for.
  2. 2nd January 2023Explain why an interpreter is often preferred while a program is being written.
  3. 3rd January 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.
  4. 4th January 2023Which CPU register holds the address of the next instruction to be fetched?
  5. 5th January 2023Distinguish between the network security threats known as phishing and pharming.
  6. 6th January 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.
  7. 7th January 2023A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  8. 8th January 2023A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  9. 9th January 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.
  10. 10th January 2023State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  11. 11th January 2023Write the pseudocode header and body for a function called isAdult that takes one integer parameter called age and returns True if age is 18 or over.
  12. 12th January 2023Give one example of an optical secondary storage device.
  13. 13th January 2023State the layer that IP operates in, and describe its job.
  14. 14th January 2023State the term used for realistic data that a program would be expected to handle during normal use.
  15. 15th January 2023State what a foreign key is used for.
  16. 16th January 2023State the difference between lossy and lossless compression.
  17. 17th January 2023State the condition that must be met before a binary search can be used on an array.
  18. 18th January 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.
  19. 19th January 2023A pseudocode algorithm is: count <- 0, x <- 10, WHILE x > 0, count <- count + 1, x <- x - 3, ENDWHILE, OUTPUT count. Complete a trace table for x and count, laid out as x | count, then state the value output.
  20. 20th January 2023Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  21. 21st January 2023Describe what syntax highlighting is and how it helps a programmer.
  22. 22nd January 2023Convert the denary number 45 to hexadecimal.
  23. 23rd January 2023What does the acronym CPU stand for?
  24. 24th January 2023State what the term malware means.
  25. 25th January 2023Trace this algorithm with data = [4, 9, 2, 9, 7] and state the final output. total = 0; count = 0; for i = 0 to 4: if data[i] > 5 then total = total + data[i] and count = count + 1; next i; print(total, count).
  26. 26th January 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).
  27. 27th January 2023Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  28. 28th January 2023Which piece of UK legislation controls how organisations must store and use people's personal data?
  29. 29th January 2023Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  30. 30th January 2023State the value returned by LENGTH(word) if word stores the string 'Computer'.
  31. 31st January 2023Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.