Revision Library
/Subjects/Computer Science/Daily Practice
Daily Practice · GCSE Computer Science

April 2020 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in April 2020, with answers. Systems, data representation, networks, algorithms and programming.

← Today's GCSE Computer Science sheet

April 2020

30 sheets · 150 questions · GCSE

April 2020 compilationAll answers

Every sheet in April 2020

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

  1. 1st April 2020Convert the denary number 45 to hexadecimal.
  2. 2nd April 2020What does the acronym CPU stand for?
  3. 3rd April 2020State what the term malware means.
  4. 4th April 2020Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  5. 5th April 2020An 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).
  6. 6th April 2020Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  7. 7th April 2020Which piece of UK legislation controls how organisations must store and use people's personal data?
  8. 8th April 2020Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  9. 9th April 2020A 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.
  10. 10th April 2020Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  11. 11th April 2020Define the term protocol.
  12. 12th April 2020A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  13. 13th April 2020A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  14. 14th April 2020State one function carried out by the operating system of a computer.
  15. 15th April 2020In computational thinking, what is meant by the term 'decomposition'?
  16. 16th April 2020Given A = 1 and B = 1, state the value of A AND B.
  17. 17th April 2020Convert the denary number 39 to an 8-bit binary number, showing your working.
  18. 18th April 2020Define a peer-to-peer network.
  19. 19th April 2020Explain the purpose of a breakpoint.
  20. 20th April 2020Convert the denary number 5 to a 4-bit binary number.
  21. 21st April 2020A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  22. 22nd April 2020A 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.
  23. 23rd April 2020Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  24. 24th April 2020A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  25. 25th April 2020State the type of program that is typically stored in ROM.
  26. 26th April 2020State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  27. 27th April 2020A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  28. 28th April 2020Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  29. 29th April 2020State the typical maximum capacity of a single-layer DVD.
  30. 30th April 2020Name the four layers of the TCP/IP model in order from the one closest to the user.