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Daily Practice · GCSE Computer Science

June 1973 5-a-day

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June 1973

30 sheets · 150 questions · GCSE

June 1973 compilationAll answers

Every sheet in June 1973

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

  1. 1st June 1973State the difference between lossy and lossless compression.
  2. 2nd June 1973State the condition that must be met before a binary search can be used on an array.
  3. 3rd June 1973A 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.
  4. 4th June 1973Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  5. 5th June 1973Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  6. 6th June 1973State why a program written in a high level language must be translated.
  7. 7th June 1973Convert the denary number 45 to hexadecimal.
  8. 8th June 1973What does the acronym CPU stand for?
  9. 9th June 1973State what the term malware means.
  10. 10th June 1973Describe what a nested loop does when it processes a 2D array.
  11. 11th June 1973An 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).
  12. 12th June 1973Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  13. 13th June 1973Which piece of UK legislation controls how organisations must store and use people's personal data?
  14. 14th June 1973Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  15. 15th June 1973A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.
  16. 16th June 1973Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  17. 17th June 1973Give two reasons why network communication is divided into layers.
  18. 18th June 1973A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  19. 19th June 1973A table called staff has fields staffId, name, department and salary, storing these records: staffId | name | department | salary, 1 | Ben | Sales | 24000, 2 | Chloe | IT | 31000, 3 | Dan | Sales | 27000. State which staffId(s) would be returned by: SELECT staffId FROM staff WHERE department = 'Sales' AND salary > 25000;
  20. 20th June 1973State one function carried out by the operating system of a computer.
  21. 21st June 1973In computational thinking, what is meant by the term 'decomposition'?
  22. 22nd June 1973Given A = 1 and B = 1, state the value of A AND B.
  23. 23rd June 1973Convert the 8-bit binary number 01011010 to denary.
  24. 24th June 1973Define a peer-to-peer network.
  25. 25th June 1973Explain why an interpreter is often preferred while a program is being written.
  26. 26th June 1973Convert the denary number 5 to a 4-bit binary number.
  27. 27th June 1973A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  28. 28th June 1973A simple cipher shifts every letter 2 places forward in the alphabet, wrapping around so Y becomes A and Z becomes B. Encrypt the plaintext CAT using this cipher.
  29. 29th June 1973A 2D array grid is declared as grid[4][6]. State how many rows and columns it has and how many elements it holds in total.
  30. 30th June 1973A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.