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Daily Practice · GCSE Computer Science

September 2010 - GCSE Computer Science 5-a-day

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

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September 2010

30 sheets · 150 questions · GCSE

September 2010 compilationAll answers

Every sheet in September 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 September 2010Given P = 0 and Q = 1, state the value of P OR Q.
  2. 2nd September 2010Convert the hexadecimal number 3F to denary.
  3. 3rd September 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.
  4. 4th September 2010Describe what syntax highlighting is and how it helps a programmer.
  5. 5th September 2010Convert the 4-bit binary number 1101 to denary.
  6. 6th September 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.
  7. 7th September 2010State why an organisation might employ penetration testers to test its network.
  8. 8th September 2010Trace 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 September 2010State one example of a file format that commonly uses lossy compression.
  10. 10th September 2010State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  11. 11th September 2010State whether the source code of proprietary (closed source) software is normally available for the public to view.
  12. 12th September 2010Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  13. 13th September 2010A 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.
  14. 14th September 2010Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  15. 15th September 2010Explain the role of TCP when a large file is downloaded.
  16. 16th September 2010Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  17. 17th September 2010A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  18. 18th September 2010Each pair from the previous question is stored using 2 bytes. Calculate the compression ratio achieved, given the uncompressed row (1 byte per pixel) uses 8 bytes.
  19. 19th September 2010Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  20. 20th September 2010State the two values a Boolean data type can hold.
  21. 21st September 2010Convert the denary number 39 to an 8-bit binary number, showing your working.
  22. 22nd September 2010Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  23. 23rd September 2010Give one advantage and one disadvantage of using a compiler.
  24. 24th September 2010Convert the hexadecimal number 1A to denary.
  25. 25th September 2010Convert the denary number 156 to an 8 bit binary number.
  26. 26th September 2010Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  27. 27th September 2010Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  28. 28th September 2010An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  29. 29th September 2010A 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.
  30. 30th September 2010Describe two negative consequences of throwing away old computer hardware instead of recycling it.