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Daily Practice · GCSE Computer Science

July 2014 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in July 2014, with answers. Systems, data representation, networks, algorithms and programming.

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July 2014

31 sheets · 155 questions · GCSE

July 2014 compilationAll answers

Every sheet in July 2014

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

  1. 1st July 2014Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  2. 2nd July 2014A 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.
  3. 3rd July 2014Name the four layers of the TCP/IP model in order from the one closest to the user.
  4. 4th July 2014Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  5. 5th July 2014A 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.
  6. 6th July 2014Define the term 'interrupt' as used to describe a signal received by a CPU.
  7. 7th July 2014An 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.
  8. 8th July 2014Evaluate X = NOT A AND B when A = 0 and B = 1.
  9. 9th July 2014Convert the hexadecimal number FF to an 8-bit binary number.
  10. 10th July 2014Give one advantage of a star topology compared with a mesh topology.
  11. 11th July 2014A 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.
  12. 12th July 2014Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  13. 13th July 2014State the three stages of the fetch-decode-execute cycle in the order they occur.
  14. 14th July 2014State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  15. 15th July 2014An array named temps holds 12 values. State the index of the first item and the index of the last item.
  16. 16th July 2014Define the term 'pixel'.
  17. 17th July 2014Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  18. 18th July 2014Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  19. 19th July 2014Evaluate the expression 23 DIV 4.
  20. 20th July 2014State the correct order of the three operations used to read data from a text file.
  21. 21st July 2014A 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.
  22. 22nd July 2014State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  23. 23rd July 2014A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  24. 24th July 2014A 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.
  25. 25th July 2014A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  26. 26th July 2014An 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.
  27. 27th July 2014Complete: NOT 0 = ?
  28. 28th July 2014Convert the denary number 200 to hexadecimal, showing your working.
  29. 29th July 2014State what LAN stands for.
  30. 30th July 2014State why a program written in a high level language must be translated.
  31. 31st July 2014An 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.