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Daily Practice · GCSE Computer Science

October 2012 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in October 2012, with answers. Systems, data representation, networks, algorithms and programming.

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October 2012

31 sheets · 155 questions · GCSE

October 2012 compilationAll answers

Every sheet in October 2012

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

  1. 1st October 2012Convert the hexadecimal number 3F to denary.
  2. 2nd October 2012Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  3. 3rd October 2012State why a program written in a high level language must be translated.
  4. 4th October 2012Convert the denary number 45 to hexadecimal.
  5. 5th October 2012What does the acronym CPU stand for?
  6. 6th October 2012State what the term malware means.
  7. 7th October 2012Describe what a nested loop does when it processes a 2D array.
  8. 8th October 2012An 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).
  9. 9th October 2012Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  10. 10th October 2012Which piece of UK legislation controls how organisations must store and use people's personal data?
  11. 11th October 2012Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  12. 12th October 2012A programmer wants any syntax error in their program to be reported before the program starts running at all. State whether a compiler or an interpreter behaves this way, and explain why.
  13. 13th October 2012Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  14. 14th October 2012Give two reasons why network communication is divided into layers.
  15. 15th October 2012A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  16. 16th October 2012A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  17. 17th October 2012State one function carried out by the operating system of a computer.
  18. 18th October 2012In computational thinking, what is meant by the term 'decomposition'?
  19. 19th October 2012Given A = 1 and B = 1, state the value of A AND B.
  20. 20th October 2012Convert the denary number 39 to an 8-bit binary number, showing your working.
  21. 21st October 2012Define a peer-to-peer network.
  22. 22nd October 2012Explain why an interpreter is often preferred while a program is being written.
  23. 23rd October 2012Convert the denary number 5 to a 4-bit binary number.
  24. 24th October 2012A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  25. 25th October 2012A 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.
  26. 26th October 2012A 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.
  27. 27th October 2012A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  28. 28th October 2012State the type of program that is typically stored in ROM.
  29. 29th October 2012State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  30. 30th October 2012A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  31. 31st October 2012Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c