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Daily Practice · GCSE Computer Science

April 2002 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in April 2002, with answers. Systems, data representation, networks, algorithms and programming.

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April 2002

30 sheets · 150 questions · GCSE

April 2002 compilationAll answers

Every sheet in April 2002

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

  1. 1st April 2002Explain why an interpreter is often preferred while a program is being written.
  2. 2nd April 2002Convert the 4-bit binary number 1101 to denary.
  3. 3rd April 2002Two 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.
  4. 4th April 2002State why an organisation might employ penetration testers to test its network.
  5. 5th April 2002A 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.
  6. 6th April 2002State one example of a file format that commonly uses lossy compression.
  7. 7th April 2002State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  8. 8th April 2002State whether the source code of proprietary (closed source) software is normally available for the public to view.
  9. 9th April 2002Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  10. 10th April 2002State the value returned by LENGTH(word) if word stores the string 'Computer'.
  11. 11th April 2002Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  12. 12th April 2002State the layer that IP operates in, and describe its job.
  13. 13th April 2002Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  14. 14th April 2002A table called books has fields bookId, title, authorId and copiesAvailable. Write an SQL statement that selects the title of every book with more than 2 copies available.
  15. 15th April 2002Each 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.
  16. 16th April 2002Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  17. 17th April 2002State the two values a Boolean data type can hold.
  18. 18th April 2002State how many different values can be represented using 5 bits, and explain your reasoning.
  19. 19th April 2002Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  20. 20th April 2002Describe what syntax highlighting is and how it helps a programmer.
  21. 21st April 2002Convert the hexadecimal number 1A to denary.
  22. 22nd April 2002Convert the denary number 156 to an 8 bit binary number.
  23. 23rd April 2002Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  24. 24th April 2002Trace 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).
  25. 25th April 2002An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  26. 26th April 2002A 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.
  27. 27th April 2002Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  28. 28th April 2002Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  29. 29th April 2002State the key difference between a procedure and a function.
  30. 30th April 2002A company backs up its files onto magnetic tape cartridges, each with a capacity of 3 TB. The company needs to back up 20 TB of data. Calculate the minimum number of cartridges needed.