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Daily Practice · GCSE Computer Science

March 1981 5-a-day

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March 1981

31 sheets · 155 questions · GCSE

March 1981 compilationAll answers

Every sheet in March 1981

The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.

  1. 1st March 1981A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  2. 2nd March 1981A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  3. 3rd March 1981An 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.
  4. 4th March 1981Complete: NOT 0 = ?
  5. 5th March 1981Convert the denary number 39 to an 8-bit binary number, showing your working.
  6. 6th March 1981State what LAN stands for.
  7. 7th March 1981Describe what syntax highlighting is and how it helps a programmer.
  8. 8th March 1981An 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.
  9. 9th March 1981Which CPU register holds the address of the next instruction to be fetched?
  10. 10th March 1981Distinguish between the network security threats known as phishing and pharming.
  11. 11th March 1981Trace 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).
  12. 12th March 1981A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  13. 13th March 1981A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  14. 14th March 1981A 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.
  15. 15th March 1981State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  16. 16th March 1981Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  17. 17th March 1981Give one example of an optical secondary storage device.
  18. 18th March 1981Explain the role of TCP when a large file is downloaded.
  19. 19th March 1981State the term used for realistic data that a program would be expected to handle during normal use.
  20. 20th March 1981A 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.
  21. 21st March 1981State the difference between lossy and lossless compression.
  22. 22nd March 1981State the condition that must be met before a binary search can be used on an array.
  23. 23rd March 1981A 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.
  24. 24th March 1981Convert the hexadecimal number FF to an 8-bit binary number.
  25. 25th March 1981Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  26. 26th March 1981Give one advantage and one disadvantage of using a compiler.
  27. 27th March 1981Convert the denary number 45 to hexadecimal.
  28. 28th March 1981What does the acronym CPU stand for?
  29. 29th March 1981State what the term malware means.
  30. 30th March 1981Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  31. 31st March 1981An 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).