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Daily Practice · GCSE Computer Science

January 2008 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in January 2008, with answers. Systems, data representation, networks, algorithms and programming.

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January 2008

31 sheets · 155 questions · GCSE

January 2008 compilationAll answers

Every sheet in January 2008

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

  1. 1st January 2008State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  2. 2nd January 2008A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  3. 3rd January 2008A 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;
  4. 4th January 2008A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  5. 5th January 2008An 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.
  6. 6th January 2008Complete: NOT 0 = ?
  7. 7th January 2008Convert the 8-bit binary number 01011010 to denary.
  8. 8th January 2008State what LAN stands for.
  9. 9th January 2008State why a program written in a high level language must be translated.
  10. 10th January 2008An 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.
  11. 11th January 2008Which CPU register holds the address of the next instruction to be fetched?
  12. 12th January 2008Distinguish between the network security threats known as phishing and pharming.
  13. 13th January 2008Describe what a nested loop does when it processes a 2D array.
  14. 14th January 2008A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  15. 15th January 2008A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  16. 16th January 2008A 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.
  17. 17th January 2008State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  18. 18th January 2008Write 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.
  19. 19th January 2008Give one example of an optical secondary storage device.
  20. 20th January 2008Give two reasons why network communication is divided into layers.
  21. 21st January 2008State the term used for realistic data that a program would be expected to handle during normal use.
  22. 22nd January 2008State what a foreign key is used for.
  23. 23rd January 2008State the difference between lossy and lossless compression.
  24. 24th January 2008State the condition that must be met before a binary search can be used on an array.
  25. 25th January 2008A 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.
  26. 26th January 2008A 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.
  27. 27th January 2008Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  28. 28th January 2008Explain why an interpreter is often preferred while a program is being written.
  29. 29th January 2008Convert the denary number 45 to hexadecimal.
  30. 30th January 2008What does the acronym CPU stand for?
  31. 31st January 2008State what the term malware means.