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Daily Practice · GCSE Computer Science

December 1962 5-a-day

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December 1962

31 sheets · 155 questions · GCSE

December 1962 compilationAll answers

Every sheet in December 1962

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

  1. 1st December 1962Convert the hexadecimal number FF to an 8-bit binary number.
  2. 2nd December 1962A 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.
  3. 3rd December 1962Explain why an interpreter is often preferred while a program is being written.
  4. 4th December 1962Convert the 4-bit binary number 1101 to denary.
  5. 5th December 1962Two 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.
  6. 6th December 1962State why an organisation might employ penetration testers to test its network.
  7. 7th December 1962A 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.
  8. 8th December 1962State one example of a file format that commonly uses lossy compression.
  9. 9th December 1962State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  10. 10th December 1962State whether the source code of proprietary (closed source) software is normally available for the public to view.
  11. 11th December 1962Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  12. 12th December 1962State the correct order of the three operations used to read data from a text file.
  13. 13th December 1962Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  14. 14th December 1962State the layer that IP operates in, and describe its job.
  15. 15th December 1962Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  16. 16th December 1962A table called products has fields productId, name, price and stock. Write an SQL statement that changes the price of the product with productId 7 to 15.99.
  17. 17th December 1962Each 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.
  18. 18th December 1962Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  19. 19th December 1962State the two values a Boolean data type can hold.
  20. 20th December 1962Convert the denary number 200 to hexadecimal, showing your working.
  21. 21st December 1962Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  22. 22nd December 1962Describe what syntax highlighting is and how it helps a programmer.
  23. 23rd December 1962Convert the hexadecimal number 1A to denary.
  24. 24th December 1962Convert the denary number 156 to an 8 bit binary number.
  25. 25th December 1962Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  26. 26th December 1962Trace 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).
  27. 27th December 1962An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  28. 28th December 1962A 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.
  29. 29th December 1962Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  30. 30th December 1962Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  31. 31st December 1962State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.