Revision Library
/Subjects/Computer Science/Daily Practice
Daily Practice · GCSE Computer Science

December 2007 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in December 2007, with answers. Systems, data representation, networks, algorithms and programming.

← Today's GCSE Computer Science sheet

December 2007

31 sheets · 155 questions · GCSE

December 2007 compilationAll answers

Every sheet in December 2007

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

  1. 1st December 2007Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  2. 2nd December 2007Explain the purpose of a breakpoint.
  3. 3rd December 2007Convert the hexadecimal number 1A to denary.
  4. 4th December 2007Convert the denary number 156 to an 8 bit binary number.
  5. 5th December 2007Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  6. 6th December 2007Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  7. 7th December 2007An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  8. 8th December 2007A 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.
  9. 9th December 2007Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  10. 10th December 2007Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  11. 11th December 2007State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  12. 12th December 2007A 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.
  13. 13th December 2007Name the four layers of the TCP/IP model in order from the one closest to the user.
  14. 14th December 2007Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  15. 15th December 2007Define the term 'primary key' as used in a database table.
  16. 16th December 2007Define the term 'interrupt' as used to describe a signal received by a CPU.
  17. 17th December 2007An 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.
  18. 18th December 2007Evaluate X = NOT A AND B when A = 0 and B = 1.
  19. 19th December 2007Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  20. 20th December 2007Give one advantage of a star topology compared with a mesh topology.
  21. 21st December 2007A 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.
  22. 22nd December 2007Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  23. 23rd December 2007State the three stages of the fetch-decode-execute cycle in the order they occur.
  24. 24th December 2007State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  25. 25th December 2007An array named temps holds 12 values. State the index of the first item and the index of the last item.
  26. 26th December 2007Define the term 'pixel'.
  27. 27th December 2007Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  28. 28th December 2007Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  29. 29th December 2007Evaluate the expression 23 DIV 4.
  30. 30th December 2007A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.
  31. 31st December 2007A 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.