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Daily Practice · GCSE Computer Science

October 2006 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in October 2006, with answers. Systems, data representation, networks, algorithms and programming.

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October 2006

31 sheets · 155 questions · GCSE

October 2006 compilationAll answers

Every sheet in October 2006

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 2006A 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.
  2. 2nd October 2006A 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?
  3. 3rd October 2006A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  4. 4th October 2006A table called staff has fields staffId, name, department and salary, storing these records: staffId | name | department | salary, 1 | Ben | Sales | 24000, 2 | Chloe | IT | 31000, 3 | Dan | Sales | 27000. State which staffId(s) would be returned by: SELECT staffId FROM staff WHERE department = 'Sales' AND salary > 25000;
  5. 5th October 2006A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  6. 6th October 2006An 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.
  7. 7th October 2006Complete: NOT 0 = ?
  8. 8th October 2006Convert the 8-bit binary number 01011010 to denary.
  9. 9th October 2006State what LAN stands for.
  10. 10th October 2006Name the translator used for assembly language and describe how it differs from a compiler.
  11. 11th October 2006An 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.
  12. 12th October 2006Which CPU register holds the address of the next instruction to be fetched?
  13. 13th October 2006Distinguish between the network security threats known as phishing and pharming.
  14. 14th October 2006Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  15. 15th October 2006A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  16. 16th October 2006A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  17. 17th October 2006A 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.
  18. 18th October 2006State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  19. 19th October 2006Write the pseudocode header and body for a function called isAdult that takes one integer parameter called age and returns True if age is 18 or over.
  20. 20th October 2006Give one example of an optical secondary storage device.
  21. 21st October 2006Define the term protocol.
  22. 22nd October 2006State the term used for realistic data that a program would be expected to handle during normal use.
  23. 23rd October 2006State what a foreign key is used for.
  24. 24th October 2006State the difference between lossy and lossless compression.
  25. 25th October 2006State the condition that must be met before a binary search can be used on an array.
  26. 26th October 2006A 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.
  27. 27th October 2006A pseudocode algorithm is: count <- 0, x <- 10, WHILE x > 0, count <- count + 1, x <- x - 3, ENDWHILE, OUTPUT count. Complete a trace table for x and count, laid out as x | count, then state the value output.
  28. 28th October 2006Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  29. 29th October 2006Explain the purpose of a breakpoint.
  30. 30th October 2006Convert the denary number 45 to hexadecimal.
  31. 31st October 2006What does the acronym CPU stand for?