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Daily Practice · GCSE Computer Science

February 1957 5-a-day

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February 1957

28 sheets · 140 questions · GCSE

February 1957 compilationAll answers

Every sheet in February 1957

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

  1. 1st February 1957Evaluate X = NOT A AND B when A = 0 and B = 1.
  2. 2nd February 1957Convert the hexadecimal number FF to an 8-bit binary number.
  3. 3rd February 1957Give one advantage of a star topology compared with a mesh topology.
  4. 4th February 1957Explain why an interpreter is often preferred while a program is being written.
  5. 5th February 1957Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  6. 6th February 1957State the three stages of the fetch-decode-execute cycle in the order they occur.
  7. 7th February 1957State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  8. 8th February 1957A 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.
  9. 9th February 1957Define the term 'pixel'.
  10. 10th February 1957Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  11. 11th February 1957Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  12. 12th February 1957Evaluate the expression 23 DIV 4.
  13. 13th February 1957State the correct order of the three operations used to read data from a text file.
  14. 14th February 1957A 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.
  15. 15th February 1957State the layer that IP operates in, and describe its job.
  16. 16th February 1957A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  17. 17th February 1957A 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.
  18. 18th February 1957A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  19. 19th February 1957An 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.
  20. 20th February 1957Complete: NOT 0 = ?
  21. 21st February 1957Convert the denary number 200 to hexadecimal, showing your working.
  22. 22nd February 1957State what LAN stands for.
  23. 23rd February 1957Describe what syntax highlighting is and how it helps a programmer.
  24. 24th February 1957An 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.
  25. 25th February 1957Which CPU register holds the address of the next instruction to be fetched?
  26. 26th February 1957Distinguish between the network security threats known as phishing and pharming.
  27. 27th February 1957Trace this algorithm with data = [4, 9, 2, 9, 7] and state the final output. total = 0; count = 0; for i = 0 to 4: if data[i] > 5 then total = total + data[i] and count = count + 1; next i; print(total, count).
  28. 28th February 1957A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.