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Daily Practice · GCSE Computer Science

November 2020 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in November 2020, with answers. Systems, data representation, networks, algorithms and programming.

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November 2020

30 sheets · 150 questions · GCSE

November 2020 compilationAll answers

Every sheet in November 2020

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

  1. 1st November 2020A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  2. 2nd November 2020A streaming company records which shows each user watches and uses this to recommend similar shows. Explain one ethical concern this could raise, even if the company only uses the data to improve recommendations.
  3. 3rd November 2020State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  4. 4th November 2020State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  5. 5th November 2020Give one example of an optical secondary storage device.
  6. 6th November 2020State the layer that IP operates in, and describe its job.
  7. 7th November 2020State the term used for realistic data that a program would be expected to handle during normal use.
  8. 8th November 2020Define the term 'primary key' as used in a database table.
  9. 9th November 2020State the difference between lossy and lossless compression.
  10. 10th November 2020State the condition that must be met before a binary search can be used on an array.
  11. 11th November 2020A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
  12. 12th November 2020Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  13. 13th November 2020Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  14. 14th November 2020Describe what syntax highlighting is and how it helps a programmer.
  15. 15th November 2020Convert the denary number 45 to hexadecimal.
  16. 16th November 2020What does the acronym CPU stand for?
  17. 17th November 2020State what the term malware means.
  18. 18th November 2020Trace 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).
  19. 19th November 2020An uncompressed file is 6000 KB. After lossless compression it is 1500 KB. Calculate the compression ratio in the form n:1 (original size : compressed size).
  20. 20th November 2020Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  21. 21st November 2020Which piece of UK legislation controls how organisations must store and use people's personal data?
  22. 22nd November 2020Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  23. 23rd November 2020A 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.
  24. 24th November 2020Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  25. 25th November 2020Explain the role of TCP when a large file is downloaded.
  26. 26th November 2020A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  27. 27th November 2020A 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;
  28. 28th November 2020State one function carried out by the operating system of a computer.
  29. 29th November 2020In computational thinking, what is meant by the term 'decomposition'?
  30. 30th November 2020Given A = 1 and B = 1, state the value of A AND B.