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Daily Practice · GCSE Computer Science

October 1981 5-a-day

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October 1981

31 sheets · 155 questions · GCSE

October 1981 compilationAll answers

Every sheet in October 1981

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 1981Give one advantage of a star topology compared with a mesh topology.
  2. 2nd October 1981A 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.
  3. 3rd October 1981Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  4. 4th October 1981State the three stages of the fetch-decode-execute cycle in the order they occur.
  5. 5th October 1981State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  6. 6th October 1981An array named temps holds 12 values. State the index of the first item and the index of the last item.
  7. 7th October 1981Define the term 'pixel'.
  8. 8th October 1981Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  9. 9th October 1981Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  10. 10th October 1981Evaluate the expression 23 DIV 4.
  11. 11th October 1981A 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.
  12. 12th October 1981A 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.
  13. 13th October 1981State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  14. 14th October 1981A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  15. 15th October 1981A 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;
  16. 16th October 1981A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  17. 17th October 1981An 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.
  18. 18th October 1981Complete: NOT 0 = ?
  19. 19th October 1981Convert the 8-bit binary number 01011010 to denary.
  20. 20th October 1981State what LAN stands for.
  21. 21st October 1981State why a program written in a high level language must be translated.
  22. 22nd October 1981An 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.
  23. 23rd October 1981Which CPU register holds the address of the next instruction to be fetched?
  24. 24th October 1981Distinguish between the network security threats known as phishing and pharming.
  25. 25th October 1981Describe what a nested loop does when it processes a 2D array.
  26. 26th October 1981A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  27. 27th October 1981A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  28. 28th October 1981A 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.
  29. 29th October 1981State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  30. 30th October 1981Write 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.
  31. 31st October 1981Give one example of an optical secondary storage device.