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Daily Practice · GCSE Computer Science

May 1977 5-a-day

← Today's GCSE Computer Science sheet

May 1977

31 sheets · 155 questions · GCSE

May 1977 compilationAll answers

Every sheet in May 1977

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

  1. 1st May 1977Explain the purpose of a breakpoint.
  2. 2nd May 1977Convert the hexadecimal number 1A to denary.
  3. 3rd May 1977Convert the denary number 156 to an 8 bit binary number.
  4. 4th May 1977Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  5. 5th May 1977Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  6. 6th May 1977An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  7. 7th May 1977A 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.
  8. 8th May 1977Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  9. 9th May 1977Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  10. 10th May 1977State the key difference between a procedure and a function.
  11. 11th May 1977A 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.
  12. 12th May 1977Name the four layers of the TCP/IP model in order from the one closest to the user.
  13. 13th May 1977Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  14. 14th May 1977Give one advantage of a relational database over a flat-file database.
  15. 15th May 1977Define the term 'interrupt' as used to describe a signal received by a CPU.
  16. 16th May 1977An 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.
  17. 17th May 1977Evaluate X = NOT A AND B when A = 0 and B = 1.
  18. 18th May 1977Convert the hexadecimal number 3F to denary.
  19. 19th May 1977Give one advantage of a star topology compared with a mesh topology.
  20. 20th May 1977A 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.
  21. 21st May 1977Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  22. 22nd May 1977State the three stages of the fetch-decode-execute cycle in the order they occur.
  23. 23rd May 1977State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  24. 24th May 1977An array named temps holds 12 values. State the index of the first item and the index of the last item.
  25. 25th May 1977Define the term 'pixel'.
  26. 26th May 1977Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  27. 27th May 1977Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  28. 28th May 1977Evaluate the expression 23 DIV 4.
  29. 29th May 1977A 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.
  30. 30th May 1977A 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.
  31. 31st May 1977State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.