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Daily Practice · GCSE Computer Science

July 1991 5-a-day

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July 1991

31 sheets · 155 questions · GCSE

July 1991 compilationAll answers

Every sheet in July 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 July 1991A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  2. 2nd July 1991A streaming company records which shows each user watches and uses this to recommend similar shows. Explain one ethical concern this could raise, even if the company only uses the data to improve recommendations.
  3. 3rd July 1991State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  4. 4th July 1991State the key difference between a procedure and a function.
  5. 5th July 1991Give one example of an optical secondary storage device.
  6. 6th July 1991Define the term protocol.
  7. 7th July 1991State the term used for realistic data that a program would be expected to handle during normal use.
  8. 8th July 1991Give one advantage of a relational database over a flat-file database.
  9. 9th July 1991State the difference between lossy and lossless compression.
  10. 10th July 1991State the condition that must be met before a binary search can be used on an array.
  11. 11th July 1991A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
  12. 12th July 1991Convert the hexadecimal number 3F to denary.
  13. 13th July 1991Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  14. 14th July 1991Explain the purpose of a breakpoint.
  15. 15th July 1991Convert the denary number 45 to hexadecimal.
  16. 16th July 1991What does the acronym CPU stand for?
  17. 17th July 1991State what the term malware means.
  18. 18th July 1991Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  19. 19th July 1991An uncompressed file is 6000 KB. After lossless compression it is 1500 KB. Calculate the compression ratio in the form n:1 (original size : compressed size).
  20. 20th July 1991Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  21. 21st July 1991Which piece of UK legislation controls how organisations must store and use people's personal data?
  22. 22nd July 1991Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  23. 23rd July 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.
  24. 24th July 1991Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  25. 25th July 1991Name the four layers of the TCP/IP model in order from the one closest to the user.
  26. 26th July 1991A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  27. 27th July 1991A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  28. 28th July 1991State one function carried out by the operating system of a computer.
  29. 29th July 1991In computational thinking, what is meant by the term 'decomposition'?
  30. 30th July 1991Given A = 1 and B = 1, state the value of A AND B.
  31. 31st July 1991Convert the denary number 39 to an 8-bit binary number, showing your working.