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Daily Practice · GCSE Computer Science

March 1972 5-a-day

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March 1972

31 sheets · 155 questions · GCSE

March 1972 compilationAll answers

Every sheet in March 1972

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

  1. 1st March 1972Define the term 'primary key' as used in a database table.
  2. 2nd March 1972State the difference between lossy and lossless compression.
  3. 3rd March 1972State the condition that must be met before a binary search can be used on an array.
  4. 4th March 1972A 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.
  5. 5th March 1972Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  6. 6th March 1972Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  7. 7th March 1972Name the translator used for assembly language and describe how it differs from a compiler.
  8. 8th March 1972Convert the denary number 45 to hexadecimal.
  9. 9th March 1972What does the acronym CPU stand for?
  10. 10th March 1972State what the term malware means.
  11. 11th March 1972Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  12. 12th March 1972An 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).
  13. 13th March 1972Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  14. 14th March 1972Which piece of UK legislation controls how organisations must store and use people's personal data?
  15. 15th March 1972Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  16. 16th March 1972A 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.
  17. 17th March 1972Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  18. 18th March 1972Define the term protocol.
  19. 19th March 1972A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  20. 20th March 1972A 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;
  21. 21st March 1972State one function carried out by the operating system of a computer.
  22. 22nd March 1972In computational thinking, what is meant by the term 'decomposition'?
  23. 23rd March 1972Given A = 1 and B = 1, state the value of A AND B.
  24. 24th March 1972Convert the 8-bit binary number 01011010 to denary.
  25. 25th March 1972Define a peer-to-peer network.
  26. 26th March 1972Explain the purpose of a breakpoint.
  27. 27th March 1972Convert the denary number 5 to a 4-bit binary number.
  28. 28th March 1972A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  29. 29th March 1972A 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.
  30. 30th March 1972Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  31. 31st March 1972A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.