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Daily Practice · GCSE Computer Science

September 1998 - GCSE Computer Science 5-a-day

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

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September 1998

30 sheets · 150 questions · GCSE

September 1998 compilationAll answers

Every sheet in September 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 September 1998Distinguish between the network security threats known as phishing and pharming.
  2. 2nd September 1998Trace 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 September 1998A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  4. 4th September 1998A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  5. 5th September 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.
  6. 6th September 1998State 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 September 1998Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  8. 8th September 1998Give one example of an optical secondary storage device.
  9. 9th September 1998Explain the role of TCP when a large file is downloaded.
  10. 10th September 1998State the term used for realistic data that a program would be expected to handle during normal use.
  11. 11th September 1998A table called members has fields memberId, firstName, lastName and joinYear. Write an SQL statement that adds a new record with memberId 12, firstName 'Priya', lastName 'Shah' and joinYear 2026.
  12. 12th September 1998State the difference between lossy and lossless compression.
  13. 13th September 1998State the condition that must be met before a binary search can be used on an array.
  14. 14th September 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.
  15. 15th September 1998Convert the hexadecimal number FF to an 8-bit binary number.
  16. 16th September 1998Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  17. 17th September 1998Give one advantage and one disadvantage of using a compiler.
  18. 18th September 1998Convert the denary number 45 to hexadecimal.
  19. 19th September 1998What does the acronym CPU stand for?
  20. 20th September 1998State what the term malware means.
  21. 21st September 1998Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  22. 22nd September 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).
  23. 23rd September 1998Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  24. 24th September 1998Which piece of UK legislation controls how organisations must store and use people's personal data?
  25. 25th September 1998Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  26. 26th September 1998State the correct order of the three operations used to read data from a text file.
  27. 27th September 1998Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  28. 28th September 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?
  29. 29th September 1998A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  30. 30th September 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.