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Daily Practice · GCSE Computer Science

October 2014 - GCSE Computer Science 5-a-day

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

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October 2014

31 sheets · 155 questions · GCSE

October 2014 compilationAll answers

Every sheet in October 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 October 2014State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  2. 2nd October 2014State whether the source code of proprietary (closed source) software is normally available for the public to view.
  3. 3rd October 2014Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  4. 4th October 2014State the value returned by LENGTH(word) if word stores the string 'Computer'.
  5. 5th October 2014Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  6. 6th October 2014A 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?
  7. 7th October 2014Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  8. 8th October 2014A table called books has fields bookId, title, authorId and copiesAvailable. Write an SQL statement that selects the title of every book with more than 2 copies available.
  9. 9th October 2014Each 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.
  10. 10th October 2014Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  11. 11th October 2014State the two values a Boolean data type can hold.
  12. 12th October 2014State how many different values can be represented using 5 bits, and explain your reasoning.
  13. 13th October 2014Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  14. 14th October 2014Name the translator used for assembly language and describe how it differs from a compiler.
  15. 15th October 2014Convert the hexadecimal number 1A to denary.
  16. 16th October 2014Convert the denary number 156 to an 8 bit binary number.
  17. 17th October 2014Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  18. 18th October 2014Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  19. 19th October 2014An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  20. 20th October 2014A 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.
  21. 21st October 2014Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  22. 22nd October 2014Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  23. 23rd October 2014State the key difference between a procedure and a function.
  24. 24th October 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.
  25. 25th October 2014Define the term protocol.
  26. 26th October 2014Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  27. 27th October 2014Give one advantage of a relational database over a flat-file database.
  28. 28th October 2014Define the term 'interrupt' as used to describe a signal received by a CPU.
  29. 29th October 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.
  30. 30th October 2014Evaluate X = NOT A AND B when A = 0 and B = 1.
  31. 31st October 2014Convert the hexadecimal number 3F to denary.