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Daily Practice · GCSE Computer Science

May 2018 - GCSE Computer Science 5-a-day

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

← Today's GCSE Computer Science sheet

May 2018

31 sheets · 155 questions · GCSE

May 2018 compilationAll answers

Every sheet in May 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 May 2018Distinguish between the network security threats known as phishing and pharming.
  2. 2nd May 2018Trace 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).
  3. 3rd May 2018A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  4. 4th May 2018A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  5. 5th May 2018A 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.
  6. 6th May 2018State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  7. 7th May 2018State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  8. 8th May 2018Give one example of an optical secondary storage device.
  9. 9th May 2018Explain the role of TCP when a large file is downloaded.
  10. 10th May 2018State the term used for realistic data that a program would be expected to handle during normal use.
  11. 11th May 2018Define the term 'primary key' as used in a database table.
  12. 12th May 2018State the difference between lossy and lossless compression.
  13. 13th May 2018State the condition that must be met before a binary search can be used on an array.
  14. 14th May 2018A 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.
  15. 15th May 2018Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  16. 16th May 2018Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  17. 17th May 2018Give one advantage and one disadvantage of using a compiler.
  18. 18th May 2018Convert the denary number 45 to hexadecimal.
  19. 19th May 2018What does the acronym CPU stand for?
  20. 20th May 2018State what the term malware means.
  21. 21st May 2018Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  22. 22nd May 2018An 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).
  23. 23rd May 2018Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  24. 24th May 2018Which piece of UK legislation controls how organisations must store and use people's personal data?
  25. 25th May 2018Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  26. 26th May 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.
  27. 27th May 2018Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  28. 28th May 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?
  29. 29th May 2018A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  30. 30th May 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;
  31. 31st May 2018State one function carried out by the operating system of a computer.