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Daily Practice · GCSE Computer Science

October 1999 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in October 1999, with answers. Systems, data representation, networks, algorithms and programming.

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October 1999

31 sheets · 155 questions · GCSE

October 1999 compilationAll answers

Every sheet in October 1999

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 1999A 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.
  2. 2nd October 1999Describe what syntax highlighting is and how it helps a programmer.
  3. 3rd October 1999Convert the 4-bit binary number 1101 to denary.
  4. 4th October 1999Two 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.
  5. 5th October 1999State why an organisation might employ penetration testers to test its network.
  6. 6th October 1999Trace 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).
  7. 7th October 1999State one example of a file format that commonly uses lossy compression.
  8. 8th October 1999State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  9. 9th October 1999State whether the source code of proprietary (closed source) software is normally available for the public to view.
  10. 10th October 1999Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  11. 11th October 1999State the value returned by LENGTH(word) if word stores the string 'Computer'.
  12. 12th October 1999Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  13. 13th October 1999Explain the role of TCP when a large file is downloaded.
  14. 14th October 1999Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  15. 15th October 1999A 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.
  16. 16th October 1999Each 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.
  17. 17th October 1999Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  18. 18th October 1999State the two values a Boolean data type can hold.
  19. 19th October 1999State how many different values can be represented using 5 bits, and explain your reasoning.
  20. 20th October 1999Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  21. 21st October 1999Give one advantage and one disadvantage of using a compiler.
  22. 22nd October 1999Convert the hexadecimal number 1A to denary.
  23. 23rd October 1999Convert the denary number 156 to an 8 bit binary number.
  24. 24th October 1999Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  25. 25th October 1999Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  26. 26th October 1999An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  27. 27th October 1999A 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.
  28. 28th October 1999Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  29. 29th October 1999Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  30. 30th October 1999State the key difference between a procedure and a function.
  31. 31st October 1999A 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.