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Daily Practice · GCSE Computer Science

October 2003 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in October 2003, with answers. Systems, data representation, networks, algorithms and programming.

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October 2003

31 sheets · 155 questions · GCSE

October 2003 compilationAll answers

Every sheet in October 2003

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 2003Given A = 1 and B = 1, state the value of A AND B.
  2. 2nd October 2003Convert the denary number 200 to hexadecimal, showing your working.
  3. 3rd October 2003Define a peer-to-peer network.
  4. 4th October 2003Describe what syntax highlighting is and how it helps a programmer.
  5. 5th October 2003Convert the denary number 5 to a 4-bit binary number.
  6. 6th October 2003A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  7. 7th October 2003A 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.
  8. 8th October 2003Trace 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).
  9. 9th October 2003A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  10. 10th October 2003State the type of program that is typically stored in ROM.
  11. 11th October 2003State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  12. 12th October 2003A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  13. 13th October 2003State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  14. 14th October 2003State the typical maximum capacity of a single-layer DVD.
  15. 15th October 2003Explain the role of TCP when a large file is downloaded.
  16. 16th October 2003State what is meant by a syntax error.
  17. 17th October 2003Define the term 'primary key' as used in a database table.
  18. 18th October 2003What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  19. 19th October 2003Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  20. 20th October 2003Given P = 0 and Q = 1, state the value of P OR Q.
  21. 21st October 2003Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  22. 22nd October 2003A 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.
  23. 23rd October 2003Give one advantage and one disadvantage of using a compiler.
  24. 24th October 2003Convert the 4-bit binary number 1101 to denary.
  25. 25th October 2003Two 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.
  26. 26th October 2003State why an organisation might employ penetration testers to test its network.
  27. 27th October 2003Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  28. 28th October 2003State one example of a file format that commonly uses lossy compression.
  29. 29th October 2003State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  30. 30th October 2003State whether the source code of proprietary (closed source) software is normally available for the public to view.
  31. 31st October 2003Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.