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Daily Practice · GCSE Computer Science

July 2022 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in July 2022, with answers. Systems, data representation, networks, algorithms and programming.

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July 2022

31 sheets · 155 questions · GCSE

July 2022 compilationAll answers

Every sheet in July 2022

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 2022A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  2. 2nd July 2022State the type of program that is typically stored in ROM.
  3. 3rd July 2022State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  4. 4th July 2022A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  5. 5th July 2022State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  6. 6th July 2022State the typical maximum capacity of a single-layer DVD.
  7. 7th July 2022Name the four layers of the TCP/IP model in order from the one closest to the user.
  8. 8th July 2022State what is meant by a syntax error.
  9. 9th July 2022Define the term 'primary key' as used in a database table.
  10. 10th July 2022What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  11. 11th July 2022Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  12. 12th July 2022Given P = 0 and Q = 1, state the value of P OR Q.
  13. 13th July 2022Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  14. 14th July 2022A 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.
  15. 15th July 2022A 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.
  16. 16th July 2022Convert the 4-bit binary number 1101 to denary.
  17. 17th July 2022Two 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.
  18. 18th July 2022State why an organisation might employ penetration testers to test its network.
  19. 19th July 2022An array named temps holds 12 values. State the index of the first item and the index of the last item.
  20. 20th July 2022State one example of a file format that commonly uses lossy compression.
  21. 21st July 2022State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  22. 22nd July 2022State whether the source code of proprietary (closed source) software is normally available for the public to view.
  23. 23rd July 2022Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  24. 24th July 2022A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.
  25. 25th July 2022Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  26. 26th July 2022State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  27. 27th July 2022Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  28. 28th July 2022A table called staff has fields staffId, name, department and salary, storing these records: staffId | name | department | salary, 1 | Ben | Sales | 24000, 2 | Chloe | IT | 31000, 3 | Dan | Sales | 27000. State which staffId(s) would be returned by: SELECT staffId FROM staff WHERE department = 'Sales' AND salary > 25000;
  29. 29th July 2022Each 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.
  30. 30th July 2022Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  31. 31st July 2022State the two values a Boolean data type can hold.