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Daily Practice · GCSE Computer Science

April 1975 5-a-day

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April 1975

30 sheets · 150 questions · GCSE

April 1975 compilationAll answers

Every sheet in April 1975

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 1975State what LAN stands for.
  2. 2nd April 1975State why a program written in a high level language must be translated.
  3. 3rd April 1975An 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 April 1975Which CPU register holds the address of the next instruction to be fetched?
  5. 5th April 1975Distinguish between the network security threats known as phishing and pharming.
  6. 6th April 1975Describe what a nested loop does when it processes a 2D array.
  7. 7th April 1975A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  8. 8th April 1975A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  9. 9th April 1975A 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 April 1975State 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 April 1975State the key difference between a procedure and a function.
  12. 12th April 1975Give one example of an optical secondary storage device.
  13. 13th April 1975Give two reasons why network communication is divided into layers.
  14. 14th April 1975State the term used for realistic data that a program would be expected to handle during normal use.
  15. 15th April 1975Give one advantage of a relational database over a flat-file database.
  16. 16th April 1975State the difference between lossy and lossless compression.
  17. 17th April 1975State the condition that must be met before a binary search can be used on an array.
  18. 18th April 1975A 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 April 1975Convert the hexadecimal number 3F to denary.
  20. 20th April 1975Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  21. 21st April 1975Explain why an interpreter is often preferred while a program is being written.
  22. 22nd April 1975Convert the denary number 45 to hexadecimal.
  23. 23rd April 1975What does the acronym CPU stand for?
  24. 24th April 1975State what the term malware means.
  25. 25th April 1975A 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.
  26. 26th April 1975An 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 April 1975Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  28. 28th April 1975Which piece of UK legislation controls how organisations must store and use people's personal data?
  29. 29th April 1975Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  30. 30th April 1975A 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.