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Daily Practice · GCSE Computer Science

January 2010 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in January 2010, with answers. Systems, data representation, networks, algorithms and programming.

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January 2010

31 sheets · 155 questions · GCSE

January 2010 compilationAll answers

Every sheet in January 2010

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 2010Convert the denary number 5 to a 4-bit binary number.
  2. 2nd January 2010A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  3. 3rd January 2010A 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.
  4. 4th January 2010Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  5. 5th January 2010A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  6. 6th January 2010State the type of program that is typically stored in ROM.
  7. 7th January 2010State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  8. 8th January 2010A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  9. 9th January 2010State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  10. 10th January 2010State the typical maximum capacity of a single-layer DVD.
  11. 11th January 2010A user reads the same email on a phone and a tablet, and deleting it on one deletes it on the other. Which protocol is in use and why?
  12. 12th January 2010State what is meant by a syntax error.
  13. 13th January 2010Define the term 'primary key' as used in a database table.
  14. 14th January 2010What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  15. 15th January 2010Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  16. 16th January 2010Given P = 0 and Q = 1, state the value of P OR Q.
  17. 17th January 2010Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  18. 18th January 2010A 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.
  19. 19th January 2010Name the translator used for assembly language and describe how it differs from a compiler.
  20. 20th January 2010Convert the 4-bit binary number 1101 to denary.
  21. 21st January 2010Two 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.
  22. 22nd January 2010State why an organisation might employ penetration testers to test its network.
  23. 23rd January 2010Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  24. 24th January 2010State one example of a file format that commonly uses lossy compression.
  25. 25th January 2010State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  26. 26th January 2010State whether the source code of proprietary (closed source) software is normally available for the public to view.
  27. 27th January 2010Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  28. 28th January 2010A 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.
  29. 29th January 2010Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  30. 30th January 2010Define the term protocol.
  31. 31st January 2010Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.