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

February 1991 5-a-day

← Today's GCSE Computer Science sheet

February 1991

28 sheets · 140 questions · GCSE

February 1991 compilationAll answers

Every sheet in February 1991

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 1991Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  2. 2nd February 1991State the key difference between a procedure and a function.
  3. 3rd February 1991A 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.
  4. 4th February 1991A user reads the same email on a phone and a tablet, and deleting it on one deletes it on the other. Which protocol is in use and why?
  5. 5th February 1991Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  6. 6th February 1991Give one advantage of a relational database over a flat-file database.
  7. 7th February 1991Define the term 'interrupt' as used to describe a signal received by a CPU.
  8. 8th February 1991An 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.
  9. 9th February 1991Evaluate X = NOT A AND B when A = 0 and B = 1.
  10. 10th February 1991Convert the hexadecimal number 3F to denary.
  11. 11th February 1991Give one advantage of a star topology compared with a mesh topology.
  12. 12th February 1991Name the translator used for assembly language and describe how it differs from a compiler.
  13. 13th February 1991Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  14. 14th February 1991State the three stages of the fetch-decode-execute cycle in the order they occur.
  15. 15th February 1991State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  16. 16th February 1991Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  17. 17th February 1991Define the term 'pixel'.
  18. 18th February 1991Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  19. 19th February 1991Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  20. 20th February 1991Evaluate the expression 23 DIV 4.
  21. 21st February 1991A 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.
  22. 22nd February 1991A 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.
  23. 23rd February 1991Define the term protocol.
  24. 24th February 1991A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  25. 25th February 1991A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  26. 26th February 1991A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  27. 27th February 1991An 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.
  28. 28th February 1991Complete: NOT 0 = ?