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Daily Practice · GCSE Computer Science

June 1978 5-a-day

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June 1978

30 sheets · 150 questions · GCSE

June 1978 compilationAll answers

Every sheet in June 1978

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 1978A 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.
  2. 2nd June 1978Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  3. 3rd June 1978Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  4. 4th June 1978Explain the purpose of a breakpoint.
  5. 5th June 1978Convert the denary number 45 to hexadecimal.
  6. 6th June 1978What does the acronym CPU stand for?
  7. 7th June 1978State what the term malware means.
  8. 8th June 1978Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  9. 9th June 1978An 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).
  10. 10th June 1978Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  11. 11th June 1978Which piece of UK legislation controls how organisations must store and use people's personal data?
  12. 12th June 1978Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  13. 13th June 1978A 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.
  14. 14th June 1978Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  15. 15th June 1978Name the four layers of the TCP/IP model in order from the one closest to the user.
  16. 16th June 1978A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  17. 17th June 1978A 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;
  18. 18th June 1978State one function carried out by the operating system of a computer.
  19. 19th June 1978In computational thinking, what is meant by the term 'decomposition'?
  20. 20th June 1978Given A = 1 and B = 1, state the value of A AND B.
  21. 21st June 1978Convert the 8-bit binary number 01011010 to denary.
  22. 22nd June 1978Define a peer-to-peer network.
  23. 23rd June 1978A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
  24. 24th June 1978Convert the denary number 5 to a 4-bit binary number.
  25. 25th June 1978A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  26. 26th June 1978A 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.
  27. 27th June 1978An array named temps holds 12 values. State the index of the first item and the index of the last item.
  28. 28th June 1978A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  29. 29th June 1978State the type of program that is typically stored in ROM.
  30. 30th June 1978State one reason a small business might choose to use open source software instead of proprietary (closed source) software.