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Daily Practice · GCSE Computer Science

March 2013 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in March 2013, with answers. Systems, data representation, networks, algorithms and programming.

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March 2013

31 sheets · 155 questions · GCSE

March 2013 compilationAll answers

Every sheet in March 2013

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

  1. 1st March 2013Given P = 0 and Q = 1, state the value of P OR Q.
  2. 2nd March 2013Convert the hexadecimal number 3F to denary.
  3. 3rd March 2013A 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 March 2013Explain why an interpreter is often preferred while a program is being written.
  5. 5th March 2013Convert the 4-bit binary number 1101 to denary.
  6. 6th March 2013Two 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 March 2013State why an organisation might employ penetration testers to test its network.
  8. 8th March 2013A 2D array grid is declared as grid[4][6]. State how many rows and columns it has and how many elements it holds in total.
  9. 9th March 2013State one example of a file format that commonly uses lossy compression.
  10. 10th March 2013State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  11. 11th March 2013State whether the source code of proprietary (closed source) software is normally available for the public to view.
  12. 12th March 2013Write 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 March 2013A 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 March 2013Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  15. 15th March 2013State the layer that IP operates in, and describe its job.
  16. 16th March 2013Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  17. 17th March 2013A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  18. 18th March 2013Each 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 March 2013Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  20. 20th March 2013State the two values a Boolean data type can hold.
  21. 21st March 2013Convert the denary number 39 to an 8-bit binary number, showing your working.
  22. 22nd March 2013Calculate 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 March 2013Describe what syntax highlighting is and how it helps a programmer.
  24. 24th March 2013Convert the hexadecimal number 1A to denary.
  25. 25th March 2013Convert the denary number 156 to an 8 bit binary number.
  26. 26th March 2013Which 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 March 2013Trace 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).
  28. 28th March 2013An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  29. 29th March 2013A 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 March 2013Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  31. 31st March 2013Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.