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Daily Practice · GCSE Computer Science

June 2018 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in June 2018, with answers. Systems, data representation, networks, algorithms and programming.

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June 2018

30 sheets · 150 questions · GCSE

June 2018 compilationAll answers

Every sheet in June 2018

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 2018In computational thinking, what is meant by the term 'decomposition'?
  2. 2nd June 2018Given A = 1 and B = 1, state the value of A AND B.
  3. 3rd June 2018Convert the 8-bit binary number 01011010 to denary.
  4. 4th June 2018Define a peer-to-peer network.
  5. 5th June 2018Name the translator used for assembly language and describe how it differs from a compiler.
  6. 6th June 2018Convert the denary number 5 to a 4-bit binary number.
  7. 7th June 2018A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  8. 8th June 2018A simple cipher shifts every letter 2 places forward in the alphabet, wrapping around so Y becomes A and Z becomes B. Encrypt the plaintext CAT using this cipher.
  9. 9th June 2018Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  10. 10th June 2018A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  11. 11th June 2018State the type of program that is typically stored in ROM.
  12. 12th June 2018State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  13. 13th June 2018A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  14. 14th June 2018Write the pseudocode header and body for a function called isAdult that takes one integer parameter called age and returns True if age is 18 or over.
  15. 15th June 2018State the typical maximum capacity of a single-layer DVD.
  16. 16th June 2018Define the term protocol.
  17. 17th June 2018State what is meant by a syntax error.
  18. 18th June 2018State what a foreign key is used for.
  19. 19th June 2018What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  20. 20th June 2018Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  21. 21st June 2018Given P = 0 and Q = 1, state the value of P OR Q.
  22. 22nd June 2018A 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.
  23. 23rd June 2018A network administrator is connecting 10 computers in a server room. Calculate the number of cables needed for a full mesh topology, and state the number needed for a star topology with one central switch.
  24. 24th June 2018Explain the purpose of a breakpoint.
  25. 25th June 2018Convert the 4-bit binary number 1101 to denary.
  26. 26th June 2018Two CPUs are compared for a task optimised for multiple cores: CPU A has 2 cores at 4.2 GHz; CPU B has 6 cores at 3.0 GHz. Explain which CPU is likely to perform better for this task.
  27. 27th June 2018State why an organisation might employ penetration testers to test its network.
  28. 28th June 2018Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  29. 29th June 2018State one example of a file format that commonly uses lossy compression.
  30. 30th June 2018State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).