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Daily Practice · GCSE Computer Science

September 1989 5-a-day

← Today's GCSE Computer Science sheet

September 1989

30 sheets · 150 questions · GCSE

September 1989 compilationAll answers

Every sheet in September 1989

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

  1. 1st September 1989State what the term malware means.
  2. 2nd September 1989Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  3. 3rd September 1989An 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).
  4. 4th September 1989Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  5. 5th September 1989Which piece of UK legislation controls how organisations must store and use people's personal data?
  6. 6th September 1989Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  7. 7th September 1989A 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.
  8. 8th September 1989Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  9. 9th September 1989Define the term protocol.
  10. 10th September 1989A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  11. 11th September 1989A 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;
  12. 12th September 1989State one function carried out by the operating system of a computer.
  13. 13th September 1989In computational thinking, what is meant by the term 'decomposition'?
  14. 14th September 1989Given A = 1 and B = 1, state the value of A AND B.
  15. 15th September 1989Convert the 8-bit binary number 01011010 to denary.
  16. 16th September 1989Define a peer-to-peer network.
  17. 17th September 1989Explain the purpose of a breakpoint.
  18. 18th September 1989Convert the denary number 5 to a 4-bit binary number.
  19. 19th September 1989A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  20. 20th September 1989A 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.
  21. 21st September 1989Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  22. 22nd September 1989A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  23. 23rd September 1989State the type of program that is typically stored in ROM.
  24. 24th September 1989State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  25. 25th September 1989A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  26. 26th September 1989Write 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.
  27. 27th September 1989State the typical maximum capacity of a single-layer DVD.
  28. 28th September 1989Name the four layers of the TCP/IP model in order from the one closest to the user.
  29. 29th September 1989State what is meant by a syntax error.
  30. 30th September 1989State what a foreign key is used for.