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Daily Practice · GCSE Computer Science

April 1965 5-a-day

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April 1965

30 sheets · 150 questions · GCSE

April 1965 compilationAll answers

Every sheet in April 1965

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 1965A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  2. 2nd April 1965An 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.
  3. 3rd April 1965Complete: NOT 0 = ?
  4. 4th April 1965State how many different values can be represented using 5 bits, and explain your reasoning.
  5. 5th April 1965State what LAN stands for.
  6. 6th April 1965Name the translator used for assembly language and describe how it differs from a compiler.
  7. 7th April 1965An 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.
  8. 8th April 1965Which CPU register holds the address of the next instruction to be fetched?
  9. 9th April 1965Distinguish between the network security threats known as phishing and pharming.
  10. 10th April 1965Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  11. 11th April 1965A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  12. 12th April 1965A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  13. 13th April 1965A 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.
  14. 14th April 1965State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  15. 15th April 1965State the key difference between a procedure and a function.
  16. 16th April 1965Give one example of an optical secondary storage device.
  17. 17th April 1965Define the term protocol.
  18. 18th April 1965State the term used for realistic data that a program would be expected to handle during normal use.
  19. 19th April 1965Give one advantage of a relational database over a flat-file database.
  20. 20th April 1965State the difference between lossy and lossless compression.
  21. 21st April 1965State the condition that must be met before a binary search can be used on an array.
  22. 22nd April 1965A 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.
  23. 23rd April 1965Convert the hexadecimal number 3F to denary.
  24. 24th April 1965Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  25. 25th April 1965Explain the purpose of a breakpoint.
  26. 26th April 1965Convert the denary number 45 to hexadecimal.
  27. 27th April 1965What does the acronym CPU stand for?
  28. 28th April 1965State what the term malware means.
  29. 29th April 1965Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  30. 30th April 1965An 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).