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Daily Practice · GCSE Computer Science

July 1986 5-a-day

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July 1986

31 sheets · 155 questions · GCSE

July 1986 compilationAll answers

Every sheet in July 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 July 1986An array named temps holds 12 values. State the index of the first item and the index of the last item.
  2. 2nd July 1986A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  3. 3rd July 1986A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  4. 4th July 1986A 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.
  5. 5th July 1986State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  6. 6th July 1986State the key difference between a procedure and a function.
  7. 7th July 1986Give one example of an optical secondary storage device.
  8. 8th July 1986State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  9. 9th July 1986State the term used for realistic data that a program would be expected to handle during normal use.
  10. 10th July 1986Give one advantage of a relational database over a flat-file database.
  11. 11th July 1986State the difference between lossy and lossless compression.
  12. 12th July 1986State the condition that must be met before a binary search can be used on an array.
  13. 13th July 1986A 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.
  14. 14th July 1986Convert the hexadecimal number 3F to denary.
  15. 15th July 1986Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  16. 16th July 1986State why a program written in a high level language must be translated.
  17. 17th July 1986Convert the denary number 45 to hexadecimal.
  18. 18th July 1986What does the acronym CPU stand for?
  19. 19th July 1986State what the term malware means.
  20. 20th July 1986Describe what a nested loop does when it processes a 2D array.
  21. 21st July 1986An 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).
  22. 22nd July 1986Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  23. 23rd July 1986Which piece of UK legislation controls how organisations must store and use people's personal data?
  24. 24th July 1986Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  25. 25th July 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.
  26. 26th July 1986Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  27. 27th July 1986Give two reasons why network communication is divided into layers.
  28. 28th July 1986A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  29. 29th July 1986A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  30. 30th July 1986State one function carried out by the operating system of a computer.
  31. 31st July 1986In computational thinking, what is meant by the term 'decomposition'?