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Daily Practice · GCSE Computer Science

March 2014 - GCSE Computer Science 5-a-day

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

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March 2014

31 sheets · 155 questions · GCSE

March 2014 compilationAll answers

Every sheet in March 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 March 2014Convert the hexadecimal number 1A to denary.
  2. 2nd March 2014Convert the denary number 156 to an 8 bit binary number.
  3. 3rd March 2014Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  4. 4th March 2014An array named temps holds 12 values. State the index of the first item and the index of the last item.
  5. 5th March 2014An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  6. 6th March 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.
  7. 7th March 2014Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  8. 8th March 2014Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  9. 9th March 2014State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  10. 10th March 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.
  11. 11th March 2014State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  12. 12th March 2014Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  13. 13th March 2014Define the term 'primary key' as used in a database table.
  14. 14th March 2014Define the term 'interrupt' as used to describe a signal received by a CPU.
  15. 15th March 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.
  16. 16th March 2014Evaluate X = NOT A AND B when A = 0 and B = 1.
  17. 17th March 2014Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  18. 18th March 2014Give one advantage of a star topology compared with a mesh topology.
  19. 19th March 2014State why a program written in a high level language must be translated.
  20. 20th March 2014Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  21. 21st March 2014State the three stages of the fetch-decode-execute cycle in the order they occur.
  22. 22nd March 2014State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  23. 23rd March 2014Describe what a nested loop does when it processes a 2D array.
  24. 24th March 2014Define the term 'pixel'.
  25. 25th March 2014Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  26. 26th March 2014Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  27. 27th March 2014Evaluate the expression 23 DIV 4.
  28. 28th March 2014A 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.
  29. 29th March 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.
  30. 30th March 2014Give two reasons why network communication is divided into layers.
  31. 31st March 2014A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?