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Daily Practice · GCSE Computer Science

February 1987 5-a-day

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February 1987

28 sheets · 140 questions · GCSE

February 1987 compilationAll answers

Every sheet in February 1987

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

  1. 1st February 1987A 1 TB hard disk drive costs 40 pounds. A 500 GB solid-state drive costs 60 pounds. Calculate the cost per gigabyte of each device, and state which is cheaper per GB. Use 1 TB = 1000 GB.
  2. 2nd February 1987A 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?
  3. 3rd February 1987A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  4. 4th February 1987A 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.
  5. 5th February 1987A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  6. 6th February 1987An array contains [9, 2, 6], to be sorted using insertion sort. Show the state of the array after each new element has been inserted into its correct position.
  7. 7th February 1987Complete: NOT 0 = ?
  8. 8th February 1987Convert the denary number 200 to hexadecimal, showing your working.
  9. 9th February 1987State what LAN stands for.
  10. 10th February 1987Name the translator used for assembly language and describe how it differs from a compiler.
  11. 11th February 1987An 8-bit register stores the value 01100000 (denary 96). State the resulting 8-bit binary value after a left shift by 1 place, and state whether an overflow occurs.
  12. 12th February 1987Which CPU register holds the address of the next instruction to be fetched?
  13. 13th February 1987Distinguish between the network security threats known as phishing and pharming.
  14. 14th February 1987Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  15. 15th February 1987A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  16. 16th February 1987A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  17. 17th February 1987A 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.
  18. 18th February 1987State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  19. 19th February 1987State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  20. 20th February 1987Give one example of an optical secondary storage device.
  21. 21st February 1987Define the term protocol.
  22. 22nd February 1987State the term used for realistic data that a program would be expected to handle during normal use.
  23. 23rd February 1987Define the term 'primary key' as used in a database table.
  24. 24th February 1987State the difference between lossy and lossless compression.
  25. 25th February 1987State the condition that must be met before a binary search can be used on an array.
  26. 26th February 1987A 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.
  27. 27th February 1987Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  28. 28th February 1987Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?