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Daily Practice · GCSE Computer Science

December 2016 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in December 2016, with answers. Systems, data representation, networks, algorithms and programming.

← Today's GCSE Computer Science sheet

December 2016

31 sheets · 155 questions · GCSE

December 2016 compilationAll answers

Every sheet in December 2016

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 2016Give one advantage and one disadvantage of using a compiler.
  2. 2nd December 2016Convert the 4-bit binary number 1101 to denary.
  3. 3rd December 2016Two 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.
  4. 4th December 2016State why an organisation might employ penetration testers to test its network.
  5. 5th December 2016Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  6. 6th December 2016State one example of a file format that commonly uses lossy compression.
  7. 7th December 2016State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  8. 8th December 2016State whether the source code of proprietary (closed source) software is normally available for the public to view.
  9. 9th December 2016Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  10. 10th December 2016A 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.
  11. 11th December 2016Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  12. 12th December 2016A 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?
  13. 13th December 2016Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  14. 14th December 2016A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  15. 15th December 2016Each 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.
  16. 16th December 2016Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  17. 17th December 2016State the two values a Boolean data type can hold.
  18. 18th December 2016Convert the denary number 39 to an 8-bit binary number, showing your working.
  19. 19th December 2016Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  20. 20th December 2016Name the translator used for assembly language and describe how it differs from a compiler.
  21. 21st December 2016Convert the hexadecimal number 1A to denary.
  22. 22nd December 2016Convert the denary number 156 to an 8 bit binary number.
  23. 23rd December 2016Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  24. 24th December 2016Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  25. 25th December 2016An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  26. 26th December 2016A 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.
  27. 27th December 2016Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  28. 28th December 2016Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  29. 29th December 2016Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  30. 30th December 2016A 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.
  31. 31st December 2016Define the term protocol.