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Daily Practice · GCSE Computer Science

June 1986 5-a-day

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June 1986

30 sheets · 150 questions · GCSE

June 1986 compilationAll answers

Every sheet in June 1986

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

  1. 1st June 1986Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  2. 2nd June 1986State what a foreign key is used for.
  3. 3rd June 1986Define the term 'interrupt' as used to describe a signal received by a CPU.
  4. 4th June 1986An 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.
  5. 5th June 1986Evaluate X = NOT A AND B when A = 0 and B = 1.
  6. 6th June 1986A 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.
  7. 7th June 1986Give one advantage of a star topology compared with a mesh topology.
  8. 8th June 1986Explain the purpose of a breakpoint.
  9. 9th June 1986Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  10. 10th June 1986State the three stages of the fetch-decode-execute cycle in the order they occur.
  11. 11th June 1986State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  12. 12th June 1986Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  13. 13th June 1986Define the term 'pixel'.
  14. 14th June 1986Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  15. 15th June 1986Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  16. 16th June 1986Evaluate the expression 23 DIV 4.
  17. 17th June 1986State the value returned by LENGTH(word) if word stores the string 'Computer'.
  18. 18th June 1986A 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.
  19. 19th June 1986Name the four layers of the TCP/IP model in order from the one closest to the user.
  20. 20th June 1986A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  21. 21st June 1986A 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.
  22. 22nd June 1986A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  23. 23rd June 1986An 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.
  24. 24th June 1986Complete: NOT 0 = ?
  25. 25th June 1986State how many different values can be represented using 5 bits, and explain your reasoning.
  26. 26th June 1986State what LAN stands for.
  27. 27th June 1986A 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.
  28. 28th June 1986An 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.
  29. 29th June 1986Which CPU register holds the address of the next instruction to be fetched?
  30. 30th June 1986Distinguish between the network security threats known as phishing and pharming.