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Daily Practice · GCSE Computer Science

February 1958 5-a-day

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February 1958

28 sheets · 140 questions · GCSE

February 1958 compilationAll answers

Every sheet in February 1958

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

  1. 1st February 1958An 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.
  2. 2nd February 1958Which CPU register holds the address of the next instruction to be fetched?
  3. 3rd February 1958Distinguish between the network security threats known as phishing and pharming.
  4. 4th February 1958An array named temps holds 12 values. State the index of the first item and the index of the last item.
  5. 5th February 1958A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  6. 6th February 1958A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  7. 7th February 1958A 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.
  8. 8th February 1958State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  9. 9th February 1958Write the pseudocode header and body for a function called isAdult that takes one integer parameter called age and returns True if age is 18 or over.
  10. 10th February 1958Give one example of an optical secondary storage device.
  11. 11th February 1958State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  12. 12th February 1958State the term used for realistic data that a program would be expected to handle during normal use.
  13. 13th February 1958State what a foreign key is used for.
  14. 14th February 1958State the difference between lossy and lossless compression.
  15. 15th February 1958State the condition that must be met before a binary search can be used on an array.
  16. 16th February 1958A 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.
  17. 17th February 1958A pseudocode algorithm is: count <- 0, x <- 10, WHILE x > 0, count <- count + 1, x <- x - 3, ENDWHILE, OUTPUT count. Complete a trace table for x and count, laid out as x | count, then state the value output.
  18. 18th February 1958Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  19. 19th February 1958State why a program written in a high level language must be translated.
  20. 20th February 1958Convert the denary number 45 to hexadecimal.
  21. 21st February 1958What does the acronym CPU stand for?
  22. 22nd February 1958State what the term malware means.
  23. 23rd February 1958Describe what a nested loop does when it processes a 2D array.
  24. 24th February 1958An 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).
  25. 25th February 1958Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  26. 26th February 1958Which piece of UK legislation controls how organisations must store and use people's personal data?
  27. 27th February 1958Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  28. 28th February 1958State the value returned by LENGTH(word) if word stores the string 'Computer'.