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Daily Practice · GCSE Computer Science

October 1995 - GCSE Computer Science 5-a-day

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October 1995

31 sheets · 155 questions · GCSE

October 1995 compilationAll answers

Every sheet in October 1995

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

  1. 1st October 1995Convert the hexadecimal number 1A to denary.
  2. 2nd October 1995Convert the denary number 156 to an 8 bit binary number.
  3. 3rd October 1995Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  4. 4th October 1995Trace 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).
  5. 5th October 1995An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  6. 6th October 1995A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
  7. 7th October 1995Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  8. 8th October 1995Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  9. 9th October 1995Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  10. 10th October 1995A company backs up its files onto magnetic tape cartridges, each with a capacity of 3 TB. The company needs to back up 20 TB of data. Calculate the minimum number of cartridges needed.
  11. 11th October 1995Explain the role of TCP when a large file is downloaded.
  12. 12th October 1995Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  13. 13th October 1995A 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.
  14. 14th October 1995Define the term 'interrupt' as used to describe a signal received by a CPU.
  15. 15th October 1995An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
  16. 16th October 1995Evaluate X = NOT A AND B when A = 0 and B = 1.
  17. 17th October 1995Convert the hexadecimal number FF to an 8-bit binary number.
  18. 18th October 1995Give one advantage of a star topology compared with a mesh topology.
  19. 19th October 1995Give one advantage and one disadvantage of using a compiler.
  20. 20th October 1995Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  21. 21st October 1995State the three stages of the fetch-decode-execute cycle in the order they occur.
  22. 22nd October 1995State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  23. 23rd October 1995Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  24. 24th October 1995Define the term 'pixel'.
  25. 25th October 1995Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  26. 26th October 1995Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  27. 27th October 1995Evaluate the expression 23 DIV 4.
  28. 28th October 1995State the correct order of the three operations used to read data from a text file.
  29. 29th October 1995A 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.
  30. 30th October 1995A 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?
  31. 31st October 1995A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?