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Daily Practice · GCSE Computer Science

August 1979 5-a-day

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August 1979

31 sheets · 155 questions · GCSE

August 1979 compilationAll answers

Every sheet in August 1979

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

  1. 1st August 1979Define the term 'pixel'.
  2. 2nd August 1979Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  3. 3rd August 1979Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  4. 4th August 1979Evaluate the expression 23 DIV 4.
  5. 5th August 1979State the correct order of the three operations used to read data from a text file.
  6. 6th August 1979A 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 August 1979State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  8. 8th August 1979A '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 August 1979A table called products has fields productId, name, price and stock. Write an SQL statement that changes the price of the product with productId 7 to 15.99.
  10. 10th August 1979A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  11. 11th August 1979An 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 August 1979Complete: NOT 0 = ?
  13. 13th August 1979Convert the denary number 200 to hexadecimal, showing your working.
  14. 14th August 1979State what LAN stands for.
  15. 15th August 1979State why a program written in a high level language must be translated.
  16. 16th August 1979An 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 August 1979Which CPU register holds the address of the next instruction to be fetched?
  18. 18th August 1979Distinguish between the network security threats known as phishing and pharming.
  19. 19th August 1979Describe what a nested loop does when it processes a 2D array.
  20. 20th August 1979A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  21. 21st August 1979A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  22. 22nd August 1979A 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 August 1979State 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 August 1979State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  25. 25th August 1979Give one example of an optical secondary storage device.
  26. 26th August 1979Give two reasons why network communication is divided into layers.
  27. 27th August 1979State the term used for realistic data that a program would be expected to handle during normal use.
  28. 28th August 1979Define the term 'primary key' as used in a database table.
  29. 29th August 1979State the difference between lossy and lossless compression.
  30. 30th August 1979State the condition that must be met before a binary search can be used on an array.
  31. 31st August 1979A 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.