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Daily Practice · GCSE Computer Science

August 1982 5-a-day

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August 1982

31 sheets · 155 questions · GCSE

August 1982 compilationAll answers

Every sheet in August 1982

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

  1. 1st August 1982A 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 August 1982Explain why an interpreter is often preferred while a program is being written.
  3. 3rd August 1982Convert the 4-bit binary number 1101 to denary.
  4. 4th August 1982Two 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 August 1982State why an organisation might employ penetration testers to test its network.
  6. 6th August 1982A 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.
  7. 7th August 1982State one example of a file format that commonly uses lossy compression.
  8. 8th August 1982State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  9. 9th August 1982State whether the source code of proprietary (closed source) software is normally available for the public to view.
  10. 10th August 1982Write 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 August 1982A 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.
  12. 12th August 1982Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  13. 13th August 1982State the layer that IP operates in, and describe its job.
  14. 14th August 1982Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  15. 15th August 1982A 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;
  16. 16th August 1982Each 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 August 1982Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  18. 18th August 1982State the two values a Boolean data type can hold.
  19. 19th August 1982Convert the 8-bit binary number 01011010 to denary.
  20. 20th August 1982Calculate 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 August 1982Describe what syntax highlighting is and how it helps a programmer.
  22. 22nd August 1982Convert the hexadecimal number 1A to denary.
  23. 23rd August 1982Convert the denary number 156 to an 8 bit binary number.
  24. 24th August 1982Which 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 August 1982Trace 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).
  26. 26th August 1982An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  27. 27th August 1982A 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 August 1982Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  29. 29th August 1982Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  30. 30th August 1982Write 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.
  31. 31st August 1982A 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.