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Daily Practice · GCSE Computer Science

July 2010 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in July 2010, with answers. Systems, data representation, networks, algorithms and programming.

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July 2010

31 sheets · 155 questions · GCSE

July 2010 compilationAll answers

Every sheet in July 2010

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

  1. 1st July 2010Name the four layers of the TCP/IP model in order from the one closest to the user.
  2. 2nd July 2010A '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 July 2010A 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 July 2010A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  5. 5th July 2010An 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 July 2010Complete: NOT 0 = ?
  7. 7th July 2010Convert the 8-bit binary number 01011010 to denary.
  8. 8th July 2010State what LAN stands for.
  9. 9th July 2010A 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.
  10. 10th July 2010An 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 July 2010Which CPU register holds the address of the next instruction to be fetched?
  12. 12th July 2010Distinguish between the network security threats known as phishing and pharming.
  13. 13th July 2010An array named temps holds 12 values. State the index of the first item and the index of the last item.
  14. 14th July 2010A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  15. 15th July 2010A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  16. 16th July 2010A 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 July 2010State 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 July 2010Write 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 July 2010Give one example of an optical secondary storage device.
  20. 20th July 2010State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  21. 21st July 2010State the term used for realistic data that a program would be expected to handle during normal use.
  22. 22nd July 2010State what a foreign key is used for.
  23. 23rd July 2010State the difference between lossy and lossless compression.
  24. 24th July 2010State the condition that must be met before a binary search can be used on an array.
  25. 25th July 2010A 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 July 2010A 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 July 2010Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  28. 28th July 2010State why a program written in a high level language must be translated.
  29. 29th July 2010Convert the denary number 45 to hexadecimal.
  30. 30th July 2010What does the acronym CPU stand for?
  31. 31st July 2010State what the term malware means.