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Daily Practice · GCSE Computer Science

October 2018 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in October 2018, with answers. Systems, data representation, networks, algorithms and programming.

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October 2018

31 sheets · 155 questions · GCSE

October 2018 compilationAll answers

Every sheet in October 2018

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 2018Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  2. 2nd October 2018A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  3. 3rd October 2018State the type of program that is typically stored in ROM.
  4. 4th October 2018State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  5. 5th October 2018A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  6. 6th October 2018State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  7. 7th October 2018State the typical maximum capacity of a single-layer DVD.
  8. 8th October 2018A 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?
  9. 9th October 2018State what is meant by a syntax error.
  10. 10th October 2018Define the term 'primary key' as used in a database table.
  11. 11th October 2018What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  12. 12th October 2018Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  13. 13th October 2018Given P = 0 and Q = 1, state the value of P OR Q.
  14. 14th October 2018Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  15. 15th October 2018A 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.
  16. 16th October 2018Name the translator used for assembly language and describe how it differs from a compiler.
  17. 17th October 2018Convert the 4-bit binary number 1101 to denary.
  18. 18th October 2018Two 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.
  19. 19th October 2018State why an organisation might employ penetration testers to test its network.
  20. 20th October 2018Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  21. 21st October 2018State one example of a file format that commonly uses lossy compression.
  22. 22nd October 2018State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  23. 23rd October 2018State whether the source code of proprietary (closed source) software is normally available for the public to view.
  24. 24th October 2018Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  25. 25th October 2018A 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.
  26. 26th October 2018Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  27. 27th October 2018Define the term protocol.
  28. 28th October 2018Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  29. 29th October 2018A 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;
  30. 30th October 2018Each 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.
  31. 31st October 2018Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?