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Daily Practice · GCSE Computer Science

September 2006 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in September 2006, with answers. Systems, data representation, networks, algorithms and programming.

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September 2006

30 sheets · 150 questions · GCSE

September 2006 compilationAll answers

Every sheet in September 2006

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 2006Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  2. 2nd September 2006Describe what syntax highlighting is and how it helps a programmer.
  3. 3rd September 2006Convert the hexadecimal number 1A to denary.
  4. 4th September 2006Convert the denary number 156 to an 8 bit binary number.
  5. 5th September 2006Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  6. 6th September 2006Trace this algorithm with data = [4, 9, 2, 9, 7] and state the final output. total = 0; count = 0; for i = 0 to 4: if data[i] > 5 then total = total + data[i] and count = count + 1; next i; print(total, count).
  7. 7th September 2006An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  8. 8th September 2006A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
  9. 9th September 2006Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  10. 10th September 2006Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  11. 11th September 2006State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  12. 12th September 2006A company backs up its files onto magnetic tape cartridges, each with a capacity of 3 TB. The company needs to back up 20 TB of data. Calculate the minimum number of cartridges needed.
  13. 13th September 2006Explain the role of TCP when a large file is downloaded.
  14. 14th September 2006Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  15. 15th September 2006Define the term 'primary key' as used in a database table.
  16. 16th September 2006Define the term 'interrupt' as used to describe a signal received by a CPU.
  17. 17th September 2006An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
  18. 18th September 2006Evaluate X = NOT A AND B when A = 0 and B = 1.
  19. 19th September 2006Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  20. 20th September 2006Give one advantage of a star topology compared with a mesh topology.
  21. 21st September 2006Give one advantage and one disadvantage of using a compiler.
  22. 22nd September 2006Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  23. 23rd September 2006State the three stages of the fetch-decode-execute cycle in the order they occur.
  24. 24th September 2006State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  25. 25th September 2006Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  26. 26th September 2006Define the term 'pixel'.
  27. 27th September 2006Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  28. 28th September 2006Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  29. 29th September 2006Evaluate the expression 23 DIV 4.
  30. 30th September 2006A 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.