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Daily Practice · GCSE Computer Science

October 1955 5-a-day

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October 1955

31 sheets · 155 questions · GCSE

October 1955 compilationAll answers

Every sheet in October 1955

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

  1. 1st October 1955Two 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.
  2. 2nd October 1955State why an organisation might employ penetration testers to test its network.
  3. 3rd October 1955Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  4. 4th October 1955State one example of a file format that commonly uses lossy compression.
  5. 5th October 1955State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  6. 6th October 1955State whether the source code of proprietary (closed source) software is normally available for the public to view.
  7. 7th October 1955Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  8. 8th October 1955A 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.
  9. 9th October 1955Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  10. 10th October 1955A user reads the same email on a phone and a tablet, and deleting it on one deletes it on the other. Which protocol is in use and why?
  11. 11th October 1955Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  12. 12th October 1955A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  13. 13th October 1955Each 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.
  14. 14th October 1955Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  15. 15th October 1955State the two values a Boolean data type can hold.
  16. 16th October 1955Convert the denary number 39 to an 8-bit binary number, showing your working.
  17. 17th October 1955Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  18. 18th October 1955Name the translator used for assembly language and describe how it differs from a compiler.
  19. 19th October 1955Convert the hexadecimal number 1A to denary.
  20. 20th October 1955Convert the denary number 156 to an 8 bit binary number.
  21. 21st October 1955Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  22. 22nd October 1955Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  23. 23rd October 1955An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  24. 24th October 1955A 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.
  25. 25th October 1955Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  26. 26th October 1955Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  27. 27th October 1955Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  28. 28th October 1955A 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.
  29. 29th October 1955Define the term protocol.
  30. 30th October 1955Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  31. 31st October 1955A table called members has fields memberId, firstName, lastName and joinYear. Write an SQL statement that adds a new record with memberId 12, firstName 'Priya', lastName 'Shah' and joinYear 2026.