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Daily Practice · GCSE Computer Science

December 1979 5-a-day

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December 1979

31 sheets · 155 questions · GCSE

December 1979 compilationAll answers

Every sheet in December 1979

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

  1. 1st December 1979A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  2. 2nd December 1979A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  3. 3rd December 1979An 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 December 1979Complete: NOT 0 = ?
  5. 5th December 1979Convert the denary number 39 to an 8-bit binary number, showing your working.
  6. 6th December 1979State what LAN stands for.
  7. 7th December 1979A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
  8. 8th December 1979An 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 December 1979Which CPU register holds the address of the next instruction to be fetched?
  10. 10th December 1979Distinguish between the network security threats known as phishing and pharming.
  11. 11th December 1979An array named temps holds 12 values. State the index of the first item and the index of the last item.
  12. 12th December 1979A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  13. 13th December 1979A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  14. 14th December 1979A 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 December 1979State 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 December 1979Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  17. 17th December 1979Give one example of an optical secondary storage device.
  18. 18th December 1979State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  19. 19th December 1979State the term used for realistic data that a program would be expected to handle during normal use.
  20. 20th December 1979A 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 December 1979State the difference between lossy and lossless compression.
  22. 22nd December 1979State the condition that must be met before a binary search can be used on an array.
  23. 23rd December 1979A 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 December 1979Convert the hexadecimal number FF to an 8-bit binary number.
  25. 25th December 1979Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  26. 26th December 1979State why a program written in a high level language must be translated.
  27. 27th December 1979Convert the denary number 45 to hexadecimal.
  28. 28th December 1979What does the acronym CPU stand for?
  29. 29th December 1979State what the term malware means.
  30. 30th December 1979Describe what a nested loop does when it processes a 2D array.
  31. 31st December 1979An 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).