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Daily Practice · GCSE Computer Science

October 2001 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in October 2001, with answers. Systems, data representation, networks, algorithms and programming.

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October 2001

31 sheets · 155 questions · GCSE

October 2001 compilationAll answers

Every sheet in October 2001

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 2001Evaluate the expression 23 DIV 4.
  2. 2nd October 2001A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.
  3. 3rd October 2001A 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.
  4. 4th October 2001Name the four layers of the TCP/IP model in order from the one closest to the user.
  5. 5th October 2001A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  6. 6th October 2001A 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;
  7. 7th October 2001A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  8. 8th October 2001An 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.
  9. 9th October 2001Complete: NOT 0 = ?
  10. 10th October 2001Convert the 8-bit binary number 01011010 to denary.
  11. 11th October 2001State what LAN stands for.
  12. 12th October 2001A 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.
  13. 13th October 2001An 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.
  14. 14th October 2001Which CPU register holds the address of the next instruction to be fetched?
  15. 15th October 2001Distinguish between the network security threats known as phishing and pharming.
  16. 16th October 2001An array named temps holds 12 values. State the index of the first item and the index of the last item.
  17. 17th October 2001A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  18. 18th October 2001A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  19. 19th October 2001A 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.
  20. 20th October 2001State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  21. 21st October 2001Write 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.
  22. 22nd October 2001Give one example of an optical secondary storage device.
  23. 23rd October 2001State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  24. 24th October 2001State the term used for realistic data that a program would be expected to handle during normal use.
  25. 25th October 2001State what a foreign key is used for.
  26. 26th October 2001State the difference between lossy and lossless compression.
  27. 27th October 2001State the condition that must be met before a binary search can be used on an array.
  28. 28th October 2001A 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.
  29. 29th October 2001A 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.
  30. 30th October 2001Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  31. 31st October 2001State why a program written in a high level language must be translated.