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Daily Practice · GCSE Computer Science

January 2005 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in January 2005, with answers. Systems, data representation, networks, algorithms and programming.

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January 2005

31 sheets · 155 questions · GCSE

January 2005 compilationAll answers

Every sheet in January 2005

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

  1. 1st January 2005Define a peer-to-peer network.
  2. 2nd January 2005Explain the purpose of a breakpoint.
  3. 3rd January 2005Convert the denary number 5 to a 4-bit binary number.
  4. 4th January 2005A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  5. 5th January 2005A 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.
  6. 6th January 2005Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  7. 7th January 2005A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  8. 8th January 2005State the type of program that is typically stored in ROM.
  9. 9th January 2005State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  10. 10th January 2005A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  11. 11th January 2005State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  12. 12th January 2005State the typical maximum capacity of a single-layer DVD.
  13. 13th January 2005Name the four layers of the TCP/IP model in order from the one closest to the user.
  14. 14th January 2005State what is meant by a syntax error.
  15. 15th January 2005Define the term 'primary key' as used in a database table.
  16. 16th January 2005What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  17. 17th January 2005Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  18. 18th January 2005Given P = 0 and Q = 1, state the value of P OR Q.
  19. 19th January 2005Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  20. 20th January 2005A network administrator is connecting 10 computers in a server room. Calculate the number of cables needed for a full mesh topology, and state the number needed for a star topology with one central switch.
  21. 21st January 2005A 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.
  22. 22nd January 2005Convert the 4-bit binary number 1101 to denary.
  23. 23rd January 2005Two CPUs are compared for a task optimised for multiple cores: CPU A has 2 cores at 4.2 GHz; CPU B has 6 cores at 3.0 GHz. Explain which CPU is likely to perform better for this task.
  24. 24th January 2005State why an organisation might employ penetration testers to test its network.
  25. 25th January 2005An array named temps holds 12 values. State the index of the first item and the index of the last item.
  26. 26th January 2005State one example of a file format that commonly uses lossy compression.
  27. 27th January 2005State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  28. 28th January 2005State whether the source code of proprietary (closed source) software is normally available for the public to view.
  29. 29th January 2005Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  30. 30th January 2005A 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.
  31. 31st January 2005Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.