Revision Library
/Subjects/Computer Science/Daily Practice
Daily Practice · GCSE Computer Science

April 2018 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in April 2018, with answers. Systems, data representation, networks, algorithms and programming.

← Today's GCSE Computer Science sheet

April 2018

30 sheets · 150 questions · GCSE

April 2018 compilationAll answers

Every sheet in April 2018

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

  1. 1st April 2018Give two reasons why network communication is divided into layers.
  2. 2nd April 2018Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  3. 3rd April 2018A table called members has fields memberId, firstName, lastName and joinYear. Write an SQL statement that adds a new record with memberId 12, firstName 'Priya', lastName 'Shah' and joinYear 2026.
  4. 4th April 2018Define the term 'interrupt' as used to describe a signal received by a CPU.
  5. 5th April 2018An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
  6. 6th April 2018Evaluate X = NOT A AND B when A = 0 and B = 1.
  7. 7th April 2018Convert the hexadecimal number FF to an 8-bit binary number.
  8. 8th April 2018Give one advantage of a star topology compared with a mesh topology.
  9. 9th April 2018Explain why an interpreter is often preferred while a program is being written.
  10. 10th April 2018Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  11. 11th April 2018State the three stages of the fetch-decode-execute cycle in the order they occur.
  12. 12th April 2018State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  13. 13th April 2018A 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.
  14. 14th April 2018Define the term 'pixel'.
  15. 15th April 2018Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  16. 16th April 2018Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  17. 17th April 2018Evaluate the expression 23 DIV 4.
  18. 18th April 2018State the correct order of the three operations used to read data from a text file.
  19. 19th April 2018A 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.
  20. 20th April 2018State the layer that IP operates in, and describe its job.
  21. 21st April 2018A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  22. 22nd April 2018A 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.
  23. 23rd April 2018A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  24. 24th April 2018An 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.
  25. 25th April 2018Complete: NOT 0 = ?
  26. 26th April 2018Convert the denary number 200 to hexadecimal, showing your working.
  27. 27th April 2018State what LAN stands for.
  28. 28th April 2018Describe what syntax highlighting is and how it helps a programmer.
  29. 29th April 2018An 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.
  30. 30th April 2018Which CPU register holds the address of the next instruction to be fetched?