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Daily Practice · GCSE Computer Science

January 1993 - GCSE Computer Science 5-a-day

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January 1993

31 sheets · 155 questions · GCSE

January 1993 compilationAll answers

Every sheet in January 1993

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 1993Define the term 'pixel'.
  2. 2nd January 1993Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  3. 3rd January 1993Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  4. 4th January 1993Evaluate the expression 23 DIV 4.
  5. 5th January 1993A 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.
  6. 6th January 1993A 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.
  7. 7th January 1993Name the four layers of the TCP/IP model in order from the one closest to the user.
  8. 8th January 1993A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  9. 9th January 1993A 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;
  10. 10th January 1993A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  11. 11th January 1993An 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.
  12. 12th January 1993Complete: NOT 0 = ?
  13. 13th January 1993Convert the 8-bit binary number 01011010 to denary.
  14. 14th January 1993State what LAN stands for.
  15. 15th January 1993A 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.
  16. 16th January 1993An 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.
  17. 17th January 1993Which CPU register holds the address of the next instruction to be fetched?
  18. 18th January 1993Distinguish between the network security threats known as phishing and pharming.
  19. 19th January 1993An array named temps holds 12 values. State the index of the first item and the index of the last item.
  20. 20th January 1993A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  21. 21st January 1993A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  22. 22nd January 1993A 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.
  23. 23rd January 1993State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  24. 24th January 1993Write 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.
  25. 25th January 1993Give one example of an optical secondary storage device.
  26. 26th January 1993State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  27. 27th January 1993State the term used for realistic data that a program would be expected to handle during normal use.
  28. 28th January 1993State what a foreign key is used for.
  29. 29th January 1993State the difference between lossy and lossless compression.
  30. 30th January 1993State the condition that must be met before a binary search can be used on an array.
  31. 31st January 1993A 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.