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Daily Practice · GCSE Computer Science

July 1959 5-a-day

← Today's GCSE Computer Science sheet

July 1959

31 sheets · 155 questions · GCSE

July 1959 compilationAll answers

Every sheet in July 1959

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

  1. 1st July 1959State why an organisation might employ penetration testers to test its network.
  2. 2nd July 1959Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  3. 3rd July 1959State one example of a file format that commonly uses lossy compression.
  4. 4th July 1959State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  5. 5th July 1959State whether the source code of proprietary (closed source) software is normally available for the public to view.
  6. 6th July 1959Write 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 July 1959A 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 July 1959Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  9. 9th July 1959Name the four layers of the TCP/IP model in order from the one closest to the user.
  10. 10th July 1959Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  11. 11th July 1959A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  12. 12th July 1959Each 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 July 1959Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  14. 14th July 1959State the two values a Boolean data type can hold.
  15. 15th July 1959Convert the denary number 39 to an 8-bit binary number, showing your working.
  16. 16th July 1959Calculate 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 July 1959A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
  18. 18th July 1959Convert the hexadecimal number 1A to denary.
  19. 19th July 1959Convert the denary number 156 to an 8 bit binary number.
  20. 20th July 1959Which 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 July 1959An array named temps holds 12 values. State the index of the first item and the index of the last item.
  22. 22nd July 1959An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  23. 23rd July 1959A 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 July 1959Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  25. 25th July 1959Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  26. 26th July 1959Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  27. 27th July 1959A 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 July 1959State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  29. 29th July 1959Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  30. 30th July 1959A 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.
  31. 31st July 1959Define the term 'interrupt' as used to describe a signal received by a CPU.