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Daily Practice · GCSE Computer Science

September 2012 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in September 2012, with answers. Systems, data representation, networks, algorithms and programming.

← Today's GCSE Computer Science sheet

September 2012

30 sheets · 150 questions · GCSE

September 2012 compilationAll answers

Every sheet in September 2012

The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.

  1. 1st September 2012Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  2. 2nd September 2012Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  3. 3rd September 2012Evaluate the expression 23 DIV 4.
  4. 4th September 2012State the value returned by LENGTH(word) if word stores the string 'Computer'.
  5. 5th September 2012A 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 September 2012Name the four layers of the TCP/IP model in order from the one closest to the user.
  7. 7th September 2012A '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 September 2012A 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 September 2012A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  10. 10th September 2012An 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 September 2012Complete: NOT 0 = ?
  12. 12th September 2012State how many different values can be represented using 5 bits, and explain your reasoning.
  13. 13th September 2012State what LAN stands for.
  14. 14th September 2012A 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.
  15. 15th September 2012An 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 September 2012Which CPU register holds the address of the next instruction to be fetched?
  17. 17th September 2012Distinguish between the network security threats known as phishing and pharming.
  18. 18th September 2012An array named temps holds 12 values. State the index of the first item and the index of the last item.
  19. 19th September 2012A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  20. 20th September 2012A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  21. 21st September 2012A 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 September 2012State 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 September 2012State the key difference between a procedure and a function.
  24. 24th September 2012Give one example of an optical secondary storage device.
  25. 25th September 2012State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  26. 26th September 2012State the term used for realistic data that a program would be expected to handle during normal use.
  27. 27th September 2012Give one advantage of a relational database over a flat-file database.
  28. 28th September 2012State the difference between lossy and lossless compression.
  29. 29th September 2012State the condition that must be met before a binary search can be used on an array.
  30. 30th September 2012A 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.