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Daily Practice · GCSE Computer Science

September 1968 5-a-day

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September 1968

30 sheets · 150 questions · GCSE

September 1968 compilationAll answers

Every sheet in September 1968

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

  1. 1st September 1968A 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.
  2. 2nd September 1968A 1 TB hard disk drive costs 40 pounds. A 500 GB solid-state drive costs 60 pounds. Calculate the cost per gigabyte of each device, and state which is cheaper per GB. Use 1 TB = 1000 GB.
  3. 3rd September 1968State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  4. 4th September 1968A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  5. 5th September 1968A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  6. 6th September 1968A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  7. 7th September 1968An 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.
  8. 8th September 1968Complete: NOT 0 = ?
  9. 9th September 1968Convert the denary number 39 to an 8-bit binary number, showing your working.
  10. 10th September 1968State what LAN stands for.
  11. 11th September 1968State why a program written in a high level language must be translated.
  12. 12th September 1968An 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.
  13. 13th September 1968Which CPU register holds the address of the next instruction to be fetched?
  14. 14th September 1968Distinguish between the network security threats known as phishing and pharming.
  15. 15th September 1968Describe what a nested loop does when it processes a 2D array.
  16. 16th September 1968A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  17. 17th September 1968A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  18. 18th September 1968A 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.
  19. 19th September 1968State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  20. 20th September 1968Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  21. 21st September 1968Give one example of an optical secondary storage device.
  22. 22nd September 1968Give two reasons why network communication is divided into layers.
  23. 23rd September 1968State the term used for realistic data that a program would be expected to handle during normal use.
  24. 24th September 1968A 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.
  25. 25th September 1968State the difference between lossy and lossless compression.
  26. 26th September 1968State the condition that must be met before a binary search can be used on an array.
  27. 27th September 1968A 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.
  28. 28th September 1968Convert the hexadecimal number FF to an 8-bit binary number.
  29. 29th September 1968Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  30. 30th September 1968Explain why an interpreter is often preferred while a program is being written.