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Daily Practice · GCSE Computer Science

January 1988 5-a-day

← Today's GCSE Computer Science sheet

January 1988

31 sheets · 155 questions · GCSE

January 1988 compilationAll answers

Every sheet in January 1988

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 1988State the three stages of the fetch-decode-execute cycle in the order they occur.
  2. 2nd January 1988State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  3. 3rd January 1988Describe what a nested loop does when it processes a 2D array.
  4. 4th January 1988Define the term 'pixel'.
  5. 5th January 1988Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  6. 6th January 1988Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  7. 7th January 1988Evaluate the expression 23 DIV 4.
  8. 8th January 1988A 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.
  9. 9th January 1988A 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.
  10. 10th January 1988Give two reasons why network communication is divided into layers.
  11. 11th January 1988A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  12. 12th January 1988A 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;
  13. 13th January 1988A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  14. 14th January 1988An 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.
  15. 15th January 1988Complete: NOT 0 = ?
  16. 16th January 1988Convert the 8-bit binary number 01011010 to denary.
  17. 17th January 1988State what LAN stands for.
  18. 18th January 1988Explain why an interpreter is often preferred while a program is being written.
  19. 19th January 1988An 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.
  20. 20th January 1988Which CPU register holds the address of the next instruction to be fetched?
  21. 21st January 1988Distinguish between the network security threats known as phishing and pharming.
  22. 22nd January 1988A 2D array grid is declared as grid[4][6]. State how many rows and columns it has and how many elements it holds in total.
  23. 23rd January 1988A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  24. 24th January 1988A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  25. 25th January 1988A 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.
  26. 26th January 1988State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  27. 27th January 1988Write 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.
  28. 28th January 1988Give one example of an optical secondary storage device.
  29. 29th January 1988State the layer that IP operates in, and describe its job.
  30. 30th January 1988State the term used for realistic data that a program would be expected to handle during normal use.
  31. 31st January 1988State what a foreign key is used for.