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Daily Practice · GCSE Computer Science

December 1967 5-a-day

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December 1967

31 sheets · 155 questions · GCSE

December 1967 compilationAll answers

Every sheet in December 1967

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 1967A 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.
  2. 2nd December 1967Convert the 4-bit binary number 1101 to denary.
  3. 3rd December 1967Two 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 December 1967State why an organisation might employ penetration testers to test its network.
  5. 5th December 1967An array named temps holds 12 values. State the index of the first item and the index of the last item.
  6. 6th December 1967State one example of a file format that commonly uses lossy compression.
  7. 7th December 1967State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  8. 8th December 1967State whether the source code of proprietary (closed source) software is normally available for the public to view.
  9. 9th December 1967Write 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 December 1967State the correct order of the three operations used to read data from a text file.
  11. 11th December 1967Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  12. 12th December 1967State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  13. 13th December 1967Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  14. 14th December 1967A 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.
  15. 15th December 1967Each 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 December 1967Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  17. 17th December 1967State the two values a Boolean data type can hold.
  18. 18th December 1967Convert the denary number 200 to hexadecimal, showing your working.
  19. 19th December 1967Calculate 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 December 1967State why a program written in a high level language must be translated.
  21. 21st December 1967Convert the hexadecimal number 1A to denary.
  22. 22nd December 1967Convert the denary number 156 to an 8 bit binary number.
  23. 23rd December 1967Which 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 December 1967Describe what a nested loop does when it processes a 2D array.
  25. 25th December 1967An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  26. 26th December 1967A 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 December 1967Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  28. 28th December 1967Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  29. 29th December 1967State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  30. 30th December 1967A 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.
  31. 31st December 1967Give two reasons why network communication is divided into layers.