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Daily Practice · GCSE Computer Science

March 2023 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in March 2023, with answers. Systems, data representation, networks, algorithms and programming.

← Today's GCSE Computer Science sheet

March 2023

31 sheets · 155 questions · GCSE

March 2023 compilationAll answers

Every sheet in March 2023

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

  1. 1st March 2023Convert the 4-bit binary number 1101 to denary.
  2. 2nd March 2023Two 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.
  3. 3rd March 2023State why an organisation might employ penetration testers to test its network.
  4. 4th March 2023Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  5. 5th March 2023State one example of a file format that commonly uses lossy compression.
  6. 6th March 2023State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  7. 7th March 2023State whether the source code of proprietary (closed source) software is normally available for the public to view.
  8. 8th March 2023Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  9. 9th March 2023A 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 March 2023Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  11. 11th March 2023Define the term protocol.
  12. 12th March 2023Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  13. 13th March 2023A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  14. 14th March 2023Each pair from the previous question is stored using 2 bytes. Calculate the compression ratio achieved, given the uncompressed row (1 byte per pixel) uses 8 bytes.
  15. 15th March 2023Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  16. 16th March 2023State the two values a Boolean data type can hold.
  17. 17th March 2023Convert the denary number 39 to an 8-bit binary number, showing your working.
  18. 18th March 2023Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  19. 19th March 2023Explain the purpose of a breakpoint.
  20. 20th March 2023Convert the hexadecimal number 1A to denary.
  21. 21st March 2023Convert the denary number 156 to an 8 bit binary number.
  22. 22nd March 2023Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  23. 23rd March 2023Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  24. 24th March 2023An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  25. 25th March 2023A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
  26. 26th March 2023Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  27. 27th March 2023Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  28. 28th March 2023Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  29. 29th March 2023A company backs up its files onto magnetic tape cartridges, each with a capacity of 3 TB. The company needs to back up 20 TB of data. Calculate the minimum number of cartridges needed.
  30. 30th March 2023Name the four layers of the TCP/IP model in order from the one closest to the user.
  31. 31st March 2023Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.