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Daily Practice · GCSE Computer Science

December 2013 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in December 2013, with answers. Systems, data representation, networks, algorithms and programming.

← Today's GCSE Computer Science sheet

December 2013

31 sheets · 155 questions · GCSE

December 2013 compilationAll answers

Every sheet in December 2013

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 2013Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  2. 2nd December 2013Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  3. 3rd December 2013Evaluate the expression 23 DIV 4.
  4. 4th December 2013State the value returned by LENGTH(word) if word stores the string 'Computer'.
  5. 5th December 2013A 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.
  6. 6th December 2013State the layer that IP operates in, and describe its job.
  7. 7th December 2013A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  8. 8th December 2013A 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 December 2013A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  10. 10th December 2013An array contains [9, 2, 6], to be sorted using insertion sort. Show the state of the array after each new element has been inserted into its correct position.
  11. 11th December 2013Complete: NOT 0 = ?
  12. 12th December 2013State how many different values can be represented using 5 bits, and explain your reasoning.
  13. 13th December 2013State what LAN stands for.
  14. 14th December 2013Describe what syntax highlighting is and how it helps a programmer.
  15. 15th December 2013An 8-bit register stores the value 01100000 (denary 96). State the resulting 8-bit binary value after a left shift by 1 place, and state whether an overflow occurs.
  16. 16th December 2013Which CPU register holds the address of the next instruction to be fetched?
  17. 17th December 2013Distinguish between the network security threats known as phishing and pharming.
  18. 18th December 2013Trace this algorithm with data = [4, 9, 2, 9, 7] and state the final output. total = 0; count = 0; for i = 0 to 4: if data[i] > 5 then total = total + data[i] and count = count + 1; next i; print(total, count).
  19. 19th December 2013A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  20. 20th December 2013A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  21. 21st December 2013A streaming company records which shows each user watches and uses this to recommend similar shows. Explain one ethical concern this could raise, even if the company only uses the data to improve recommendations.
  22. 22nd December 2013State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  23. 23rd December 2013State the key difference between a procedure and a function.
  24. 24th December 2013Give one example of an optical secondary storage device.
  25. 25th December 2013Explain the role of TCP when a large file is downloaded.
  26. 26th December 2013State the term used for realistic data that a program would be expected to handle during normal use.
  27. 27th December 2013Give one advantage of a relational database over a flat-file database.
  28. 28th December 2013State the difference between lossy and lossless compression.
  29. 29th December 2013State the condition that must be met before a binary search can be used on an array.
  30. 30th December 2013A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
  31. 31st December 2013Convert the hexadecimal number 3F to denary.