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Daily Practice · GCSE Computer Science

December 1988 5-a-day

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December 1988

31 sheets · 155 questions · GCSE

December 1988 compilationAll answers

Every sheet in December 1988

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 1988Define the term 'interrupt' as used to describe a signal received by a CPU.
  2. 2nd December 1988An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
  3. 3rd December 1988Evaluate X = NOT A AND B when A = 0 and B = 1.
  4. 4th December 1988A pseudocode algorithm is: count <- 0, x <- 10, WHILE x > 0, count <- count + 1, x <- x - 3, ENDWHILE, OUTPUT count. Complete a trace table for x and count, laid out as x | count, then state the value output.
  5. 5th December 1988Give one advantage of a star topology compared with a mesh topology.
  6. 6th December 1988Name the translator used for assembly language and describe how it differs from a compiler.
  7. 7th December 1988Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  8. 8th December 1988State the three stages of the fetch-decode-execute cycle in the order they occur.
  9. 9th December 1988State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  10. 10th December 1988Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  11. 11th December 1988Define the term 'pixel'.
  12. 12th December 1988Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  13. 13th December 1988Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  14. 14th December 1988Evaluate the expression 23 DIV 4.
  15. 15th December 1988State the value returned by LENGTH(word) if word stores the string 'Computer'.
  16. 16th December 1988A 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.
  17. 17th December 1988Define the term protocol.
  18. 18th December 1988A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  19. 19th December 1988A table called books has fields bookId, title, authorId and copiesAvailable. Write an SQL statement that selects the title of every book with more than 2 copies available.
  20. 20th December 1988A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  21. 21st December 1988An 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.
  22. 22nd December 1988Complete: NOT 0 = ?
  23. 23rd December 1988State how many different values can be represented using 5 bits, and explain your reasoning.
  24. 24th December 1988State what LAN stands for.
  25. 25th December 1988Explain the purpose of a breakpoint.
  26. 26th December 1988An 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.
  27. 27th December 1988Which CPU register holds the address of the next instruction to be fetched?
  28. 28th December 1988Distinguish between the network security threats known as phishing and pharming.
  29. 29th December 1988Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  30. 30th December 1988A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  31. 31st December 1988A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.