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Daily Practice · GCSE Computer Science

October 2005 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in October 2005, with answers. Systems, data representation, networks, algorithms and programming.

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October 2005

31 sheets · 155 questions · GCSE

October 2005 compilationAll answers

Every sheet in October 2005

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 2005A 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.
  2. 2nd October 2005Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  3. 3rd October 2005Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  4. 4th October 2005Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  5. 5th October 2005A 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.
  6. 6th October 2005Name the four layers of the TCP/IP model in order from the one closest to the user.
  7. 7th October 2005Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  8. 8th October 2005A 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.
  9. 9th October 2005Define the term 'interrupt' as used to describe a signal received by a CPU.
  10. 10th October 2005An 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.
  11. 11th October 2005Evaluate X = NOT A AND B when A = 0 and B = 1.
  12. 12th October 2005Convert the hexadecimal number FF to an 8-bit binary number.
  13. 13th October 2005Give one advantage of a star topology compared with a mesh topology.
  14. 14th October 2005A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
  15. 15th October 2005Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  16. 16th October 2005State the three stages of the fetch-decode-execute cycle in the order they occur.
  17. 17th October 2005State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  18. 18th October 2005An array named temps holds 12 values. State the index of the first item and the index of the last item.
  19. 19th October 2005Define the term 'pixel'.
  20. 20th October 2005Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  21. 21st October 2005Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  22. 22nd October 2005Evaluate the expression 23 DIV 4.
  23. 23rd October 2005State the correct order of the three operations used to read data from a text file.
  24. 24th October 2005A 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.
  25. 25th October 2005State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  26. 26th October 2005A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  27. 27th October 2005A 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.
  28. 28th October 2005A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  29. 29th October 2005An 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.
  30. 30th October 2005Complete: NOT 0 = ?
  31. 31st October 2005Convert the denary number 200 to hexadecimal, showing your working.