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Daily Practice · GCSE Computer Science

April 1958 5-a-day

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April 1958

30 sheets · 150 questions · GCSE

April 1958 compilationAll answers

Every sheet in April 1958

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 1958State why an organisation might employ penetration testers to test its network.
  2. 2nd April 1958Trace this algorithm with data = [4, 9, 2, 9, 7] and state the final output. total = 0; count = 0; for i = 0 to 4: if data[i] > 5 then total = total + data[i] and count = count + 1; next i; print(total, count).
  3. 3rd April 1958State one example of a file format that commonly uses lossy compression.
  4. 4th April 1958State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  5. 5th April 1958State whether the source code of proprietary (closed source) software is normally available for the public to view.
  6. 6th April 1958Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  7. 7th April 1958A 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.
  8. 8th April 1958Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  9. 9th April 1958Explain the role of TCP when a large file is downloaded.
  10. 10th April 1958Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  11. 11th April 1958A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  12. 12th April 1958Each 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.
  13. 13th April 1958Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  14. 14th April 1958State the two values a Boolean data type can hold.
  15. 15th April 1958Convert the denary number 39 to an 8-bit binary number, showing your working.
  16. 16th April 1958Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  17. 17th April 1958Give one advantage and one disadvantage of using a compiler.
  18. 18th April 1958Convert the hexadecimal number 1A to denary.
  19. 19th April 1958Convert the denary number 156 to an 8 bit binary number.
  20. 20th April 1958Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  21. 21st April 1958Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  22. 22nd April 1958An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  23. 23rd April 1958A 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.
  24. 24th April 1958Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  25. 25th April 1958Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  26. 26th April 1958Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  27. 27th April 1958A 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.
  28. 28th April 1958A 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?
  29. 29th April 1958Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  30. 30th April 1958A 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.