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Daily Practice · GCSE Computer Science

February 1986 5-a-day

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February 1986

28 sheets · 140 questions · GCSE

February 1986 compilationAll answers

Every sheet in February 1986

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 1986A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
  2. 2nd February 1986Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  3. 3rd February 1986Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  4. 4th February 1986State the key difference between a procedure and a function.
  5. 5th February 1986A company backs up its files onto magnetic tape cartridges, each with a capacity of 3 TB. The company needs to back up 20 TB of data. Calculate the minimum number of cartridges needed.
  6. 6th February 1986Name the four layers of the TCP/IP model in order from the one closest to the user.
  7. 7th February 1986Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  8. 8th February 1986Give one advantage of a relational database over a flat-file database.
  9. 9th February 1986Define the term 'interrupt' as used to describe a signal received by a CPU.
  10. 10th February 1986An 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.
  11. 11th February 1986Evaluate X = NOT A AND B when A = 0 and B = 1.
  12. 12th February 1986Convert the hexadecimal number 3F to denary.
  13. 13th February 1986Give one advantage of a star topology compared with a mesh topology.
  14. 14th February 1986A 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.
  15. 15th February 1986Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  16. 16th February 1986State the three stages of the fetch-decode-execute cycle in the order they occur.
  17. 17th February 1986State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  18. 18th February 1986An array named temps holds 12 values. State the index of the first item and the index of the last item.
  19. 19th February 1986Define the term 'pixel'.
  20. 20th February 1986Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  21. 21st February 1986Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  22. 22nd February 1986Evaluate the expression 23 DIV 4.
  23. 23rd February 1986A programmer wants any syntax error in their program to be reported before the program starts running at all. State whether a compiler or an interpreter behaves this way, and explain why.
  24. 24th February 1986A 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.
  25. 25th February 1986State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  26. 26th February 1986A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  27. 27th February 1986A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  28. 28th February 1986A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).