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Daily Practice · GCSE Computer Science

August 2021 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in August 2021, with answers. Systems, data representation, networks, algorithms and programming.

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August 2021

31 sheets · 155 questions · GCSE

August 2021 compilationAll answers

Every sheet in August 2021

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

  1. 1st August 2021A 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.
  2. 2nd August 2021What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  3. 3rd August 2021Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  4. 4th August 2021Given P = 0 and Q = 1, state the value of P OR Q.
  5. 5th August 2021Convert the hexadecimal number FF to an 8-bit binary number.
  6. 6th August 2021A network administrator is connecting 10 computers in a server room. Calculate the number of cables needed for a full mesh topology, and state the number needed for a star topology with one central switch.
  7. 7th August 2021Describe what syntax highlighting is and how it helps a programmer.
  8. 8th August 2021Convert the 4-bit binary number 1101 to denary.
  9. 9th August 2021Two 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.
  10. 10th August 2021State why an organisation might employ penetration testers to test its network.
  11. 11th August 2021Trace 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).
  12. 12th August 2021State one example of a file format that commonly uses lossy compression.
  13. 13th August 2021State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  14. 14th August 2021State whether the source code of proprietary (closed source) software is normally available for the public to view.
  15. 15th August 2021Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  16. 16th August 2021State the correct order of the three operations used to read data from a text file.
  17. 17th August 2021Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  18. 18th August 2021Explain the role of TCP when a large file is downloaded.
  19. 19th August 2021Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  20. 20th August 2021A table called products has fields productId, name, price and stock. Write an SQL statement that changes the price of the product with productId 7 to 15.99.
  21. 21st August 2021Each 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.
  22. 22nd August 2021Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  23. 23rd August 2021State the two values a Boolean data type can hold.
  24. 24th August 2021Convert the denary number 200 to hexadecimal, showing your working.
  25. 25th August 2021Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  26. 26th August 2021Give one advantage and one disadvantage of using a compiler.
  27. 27th August 2021Convert the hexadecimal number 1A to denary.
  28. 28th August 2021Convert the denary number 156 to an 8 bit binary number.
  29. 29th August 2021Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  30. 30th August 2021Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  31. 31st August 2021An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.