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Daily Practice · GCSE Computer Science

April 1970 5-a-day

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April 1970

30 sheets · 150 questions · GCSE

April 1970 compilationAll answers

Every sheet in April 1970

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 1970Complete: NOT 0 = ?
  2. 2nd April 1970State how many different values can be represented using 5 bits, and explain your reasoning.
  3. 3rd April 1970State what LAN stands for.
  4. 4th April 1970Describe what syntax highlighting is and how it helps a programmer.
  5. 5th April 1970An 8-bit register stores the value 01100000 (denary 96). State the resulting 8-bit binary value after a left shift by 1 place, and state whether an overflow occurs.
  6. 6th April 1970Which CPU register holds the address of the next instruction to be fetched?
  7. 7th April 1970Distinguish between the network security threats known as phishing and pharming.
  8. 8th April 1970Trace 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).
  9. 9th April 1970A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  10. 10th April 1970A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  11. 11th April 1970A 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.
  12. 12th April 1970State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  13. 13th April 1970State the key difference between a procedure and a function.
  14. 14th April 1970Give one example of an optical secondary storage device.
  15. 15th April 1970Explain the role of TCP when a large file is downloaded.
  16. 16th April 1970State the term used for realistic data that a program would be expected to handle during normal use.
  17. 17th April 1970Give one advantage of a relational database over a flat-file database.
  18. 18th April 1970State the difference between lossy and lossless compression.
  19. 19th April 1970State the condition that must be met before a binary search can be used on an array.
  20. 20th April 1970A 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.
  21. 21st April 1970Convert the hexadecimal number 3F to denary.
  22. 22nd April 1970Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  23. 23rd April 1970Give one advantage and one disadvantage of using a compiler.
  24. 24th April 1970Convert the denary number 45 to hexadecimal.
  25. 25th April 1970What does the acronym CPU stand for?
  26. 26th April 1970State what the term malware means.
  27. 27th April 1970Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  28. 28th April 1970An 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).
  29. 29th April 1970Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  30. 30th April 1970Which piece of UK legislation controls how organisations must store and use people's personal data?