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Daily Practice · GCSE Computer Science

May 1986 5-a-day

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May 1986

31 sheets · 155 questions · GCSE

May 1986 compilationAll answers

Every sheet in May 1986

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

  1. 1st May 1986Give one advantage and one disadvantage of using a compiler.
  2. 2nd May 1986Convert the 4-bit binary number 1101 to denary.
  3. 3rd May 1986Two 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 May 1986State why an organisation might employ penetration testers to test its network.
  5. 5th May 1986Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  6. 6th May 1986State one example of a file format that commonly uses lossy compression.
  7. 7th May 1986State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  8. 8th May 1986State whether the source code of proprietary (closed source) software is normally available for the public to view.
  9. 9th May 1986Write 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 May 1986A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.
  11. 11th May 1986Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  12. 12th May 1986A user reads the same email on a phone and a tablet, and deleting it on one deletes it on the other. Which protocol is in use and why?
  13. 13th May 1986Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  14. 14th May 1986A table called staff has fields staffId, name, department and salary, storing these records: staffId | name | department | salary, 1 | Ben | Sales | 24000, 2 | Chloe | IT | 31000, 3 | Dan | Sales | 27000. State which staffId(s) would be returned by: SELECT staffId FROM staff WHERE department = 'Sales' AND salary > 25000;
  15. 15th May 1986Each 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 May 1986Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  17. 17th May 1986State the two values a Boolean data type can hold.
  18. 18th May 1986Convert the 8-bit binary number 01011010 to denary.
  19. 19th May 1986Calculate 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 May 1986Name the translator used for assembly language and describe how it differs from a compiler.
  21. 21st May 1986Convert the hexadecimal number 1A to denary.
  22. 22nd May 1986Convert the denary number 156 to an 8 bit binary number.
  23. 23rd May 1986Which 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 May 1986Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  25. 25th May 1986An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  26. 26th May 1986A 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 May 1986Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  28. 28th May 1986Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  29. 29th May 1986Write the pseudocode header and body for a function called isAdult that takes one integer parameter called age and returns True if age is 18 or over.
  30. 30th May 1986A 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 May 1986Define the term protocol.