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Daily Practice · GCSE Computer Science

May 1998 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in May 1998, with answers. Systems, data representation, networks, algorithms and programming.

← Today's GCSE Computer Science sheet

May 1998

31 sheets · 155 questions · GCSE

May 1998 compilationAll answers

Every sheet in May 1998

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 1998A 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.
  2. 2nd May 1998A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  3. 3rd May 1998An 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.
  4. 4th May 1998Complete: NOT 0 = ?
  5. 5th May 1998Convert the denary number 200 to hexadecimal, showing your working.
  6. 6th May 1998State what LAN stands for.
  7. 7th May 1998Give one advantage and one disadvantage of using a compiler.
  8. 8th May 1998An 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.
  9. 9th May 1998Which CPU register holds the address of the next instruction to be fetched?
  10. 10th May 1998Distinguish between the network security threats known as phishing and pharming.
  11. 11th May 1998Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  12. 12th May 1998A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  13. 13th May 1998A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  14. 14th May 1998A 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.
  15. 15th May 1998State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  16. 16th May 1998State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  17. 17th May 1998Give one example of an optical secondary storage device.
  18. 18th May 1998A 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?
  19. 19th May 1998State the term used for realistic data that a program would be expected to handle during normal use.
  20. 20th May 1998Define the term 'primary key' as used in a database table.
  21. 21st May 1998State the difference between lossy and lossless compression.
  22. 22nd May 1998State the condition that must be met before a binary search can be used on an array.
  23. 23rd May 1998A 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.
  24. 24th May 1998Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  25. 25th May 1998Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  26. 26th May 1998Name the translator used for assembly language and describe how it differs from a compiler.
  27. 27th May 1998Convert the denary number 45 to hexadecimal.
  28. 28th May 1998What does the acronym CPU stand for?
  29. 29th May 1998State what the term malware means.
  30. 30th May 1998Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  31. 31st May 1998An 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).