Revision Library
/Subjects/Computer Science/Daily Practice
Daily Practice · GCSE Computer Science

January 2001 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in January 2001, with answers. Systems, data representation, networks, algorithms and programming.

← Today's GCSE Computer Science sheet

January 2001

31 sheets · 155 questions · GCSE

January 2001 compilationAll answers

Every sheet in January 2001

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 2001Convert the 4-bit binary number 1101 to denary.
  2. 2nd January 2001Two 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.
  3. 3rd January 2001State why an organisation might employ penetration testers to test its network.
  4. 4th January 2001Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  5. 5th January 2001State one example of a file format that commonly uses lossy compression.
  6. 6th January 2001State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  7. 7th January 2001State whether the source code of proprietary (closed source) software is normally available for the public to view.
  8. 8th January 2001Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  9. 9th January 2001State the value returned by LENGTH(word) if word stores the string 'Computer'.
  10. 10th January 2001Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  11. 11th January 2001Name the four layers of the TCP/IP model in order from the one closest to the user.
  12. 12th January 2001Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  13. 13th January 2001A 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.
  14. 14th January 2001Each 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.
  15. 15th January 2001Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  16. 16th January 2001State the two values a Boolean data type can hold.
  17. 17th January 2001State how many different values can be represented using 5 bits, and explain your reasoning.
  18. 18th January 2001Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  19. 19th January 2001A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
  20. 20th January 2001Convert the hexadecimal number 1A to denary.
  21. 21st January 2001Convert the denary number 156 to an 8 bit binary number.
  22. 22nd January 2001Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  23. 23rd January 2001An array named temps holds 12 values. State the index of the first item and the index of the last item.
  24. 24th January 2001An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  25. 25th January 2001A 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.
  26. 26th January 2001Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  27. 27th January 2001Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  28. 28th January 2001State the key difference between a procedure and a function.
  29. 29th January 2001A 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.
  30. 30th January 2001State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  31. 31st January 2001Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.