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Daily Practice · GCSE Computer Science

December 2011 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in December 2011, with answers. Systems, data representation, networks, algorithms and programming.

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December 2011

31 sheets · 155 questions · GCSE

December 2011 compilationAll answers

Every sheet in December 2011

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 2011Given P = 0 and Q = 1, state the value of P OR Q.
  2. 2nd December 2011Convert the hexadecimal number 3F to denary.
  3. 3rd December 2011A network administrator is connecting 10 computers in a server room. Calculate the number of cables needed for a full mesh topology, and state the number needed for a star topology with one central switch.
  4. 4th December 2011Explain the purpose of a breakpoint.
  5. 5th December 2011Convert the 4-bit binary number 1101 to denary.
  6. 6th December 2011Two CPUs are compared for a task optimised for multiple cores: CPU A has 2 cores at 4.2 GHz; CPU B has 6 cores at 3.0 GHz. Explain which CPU is likely to perform better for this task.
  7. 7th December 2011State why an organisation might employ penetration testers to test its network.
  8. 8th December 2011Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  9. 9th December 2011State one example of a file format that commonly uses lossy compression.
  10. 10th December 2011State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  11. 11th December 2011State whether the source code of proprietary (closed source) software is normally available for the public to view.
  12. 12th December 2011Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  13. 13th December 2011A programmer wants any syntax error in their program to be reported before the program starts running at all. State whether a compiler or an interpreter behaves this way, and explain why.
  14. 14th December 2011Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  15. 15th December 2011Name the four layers of the TCP/IP model in order from the one closest to the user.
  16. 16th December 2011Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  17. 17th December 2011A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  18. 18th December 2011Each pair from the previous question is stored using 2 bytes. Calculate the compression ratio achieved, given the uncompressed row (1 byte per pixel) uses 8 bytes.
  19. 19th December 2011Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  20. 20th December 2011State the two values a Boolean data type can hold.
  21. 21st December 2011Convert the denary number 39 to an 8-bit binary number, showing your working.
  22. 22nd December 2011Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  23. 23rd December 2011A 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.
  24. 24th December 2011Convert the hexadecimal number 1A to denary.
  25. 25th December 2011Convert the denary number 156 to an 8 bit binary number.
  26. 26th December 2011Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  27. 27th December 2011An array named temps holds 12 values. State the index of the first item and the index of the last item.
  28. 28th December 2011An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  29. 29th December 2011A 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.
  30. 30th December 2011Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  31. 31st December 2011Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.