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Daily Practice · GCSE Computer Science

April 1990 5-a-day

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April 1990

30 sheets · 150 questions · GCSE

April 1990 compilationAll answers

Every sheet in April 1990

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

  1. 1st April 1990A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  2. 2nd April 1990A 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 April 1990State 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 April 1990State the key difference between a procedure and a function.
  5. 5th April 1990Give one example of an optical secondary storage device.
  6. 6th April 1990State the layer that IP operates in, and describe its job.
  7. 7th April 1990State the term used for realistic data that a program would be expected to handle during normal use.
  8. 8th April 1990Give one advantage of a relational database over a flat-file database.
  9. 9th April 1990State the difference between lossy and lossless compression.
  10. 10th April 1990State the condition that must be met before a binary search can be used on an array.
  11. 11th April 1990A 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 April 1990Convert the hexadecimal number 3F to denary.
  13. 13th April 1990Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  14. 14th April 1990Describe what syntax highlighting is and how it helps a programmer.
  15. 15th April 1990Convert the denary number 45 to hexadecimal.
  16. 16th April 1990What does the acronym CPU stand for?
  17. 17th April 1990State what the term malware means.
  18. 18th April 1990Trace this algorithm with data = [4, 9, 2, 9, 7] and state the final output. total = 0; count = 0; for i = 0 to 4: if data[i] > 5 then total = total + data[i] and count = count + 1; next i; print(total, count).
  19. 19th April 1990An 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 April 1990Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  21. 21st April 1990Which piece of UK legislation controls how organisations must store and use people's personal data?
  22. 22nd April 1990Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  23. 23rd April 1990A 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 April 1990Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  25. 25th April 1990Explain the role of TCP when a large file is downloaded.
  26. 26th April 1990A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  27. 27th April 1990A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  28. 28th April 1990State one function carried out by the operating system of a computer.
  29. 29th April 1990In computational thinking, what is meant by the term 'decomposition'?
  30. 30th April 1990Given A = 1 and B = 1, state the value of A AND B.