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Daily Practice · GCSE Computer Science

January 1964 5-a-day

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January 1964

31 sheets · 155 questions · GCSE

January 1964 compilationAll answers

Every sheet in January 1964

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 1964A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  2. 2nd January 1964An 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 January 1964Complete: NOT 0 = ?
  4. 4th January 1964State how many different values can be represented using 5 bits, and explain your reasoning.
  5. 5th January 1964State what LAN stands for.
  6. 6th January 1964Explain why an interpreter is often preferred while a program is being written.
  7. 7th January 1964An 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 January 1964Which CPU register holds the address of the next instruction to be fetched?
  9. 9th January 1964Distinguish between the network security threats known as phishing and pharming.
  10. 10th January 1964A 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.
  11. 11th January 1964A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  12. 12th January 1964A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  13. 13th January 1964A 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 January 1964State 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 January 1964State the key difference between a procedure and a function.
  16. 16th January 1964Give one example of an optical secondary storage device.
  17. 17th January 1964State the layer that IP operates in, and describe its job.
  18. 18th January 1964State the term used for realistic data that a program would be expected to handle during normal use.
  19. 19th January 1964Give one advantage of a relational database over a flat-file database.
  20. 20th January 1964State the difference between lossy and lossless compression.
  21. 21st January 1964State the condition that must be met before a binary search can be used on an array.
  22. 22nd January 1964A 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 January 1964Convert the hexadecimal number 3F to denary.
  24. 24th January 1964Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  25. 25th January 1964Describe what syntax highlighting is and how it helps a programmer.
  26. 26th January 1964Convert the denary number 45 to hexadecimal.
  27. 27th January 1964What does the acronym CPU stand for?
  28. 28th January 1964State what the term malware means.
  29. 29th January 1964Trace 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).
  30. 30th January 1964An 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).
  31. 31st January 1964Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?