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Daily Practice · GCSE Computer Science

January 1979 5-a-day

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January 1979

31 sheets · 155 questions · GCSE

January 1979 compilationAll answers

Every sheet in January 1979

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

  1. 1st January 1979Which CPU register holds the address of the next instruction to be fetched?
  2. 2nd January 1979Distinguish between the network security threats known as phishing and pharming.
  3. 3rd January 1979Trace 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).
  4. 4th January 1979A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  5. 5th January 1979A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  6. 6th January 1979A 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.
  7. 7th January 1979State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  8. 8th January 1979State the key difference between a procedure and a function.
  9. 9th January 1979Give one example of an optical secondary storage device.
  10. 10th January 1979Explain the role of TCP when a large file is downloaded.
  11. 11th January 1979State the term used for realistic data that a program would be expected to handle during normal use.
  12. 12th January 1979Give one advantage of a relational database over a flat-file database.
  13. 13th January 1979State the difference between lossy and lossless compression.
  14. 14th January 1979State the condition that must be met before a binary search can be used on an array.
  15. 15th January 1979A 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.
  16. 16th January 1979Convert the hexadecimal number 3F to denary.
  17. 17th January 1979Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  18. 18th January 1979Give one advantage and one disadvantage of using a compiler.
  19. 19th January 1979Convert the denary number 45 to hexadecimal.
  20. 20th January 1979What does the acronym CPU stand for?
  21. 21st January 1979State what the term malware means.
  22. 22nd January 1979Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  23. 23rd January 1979An 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).
  24. 24th January 1979Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  25. 25th January 1979Which piece of UK legislation controls how organisations must store and use people's personal data?
  26. 26th January 1979Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  27. 27th January 1979A 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.
  28. 28th January 1979Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  29. 29th January 1979A 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?
  30. 30th January 1979A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  31. 31st January 1979A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.