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Daily Practice · GCSE Computer Science

August 1992 - GCSE Computer Science 5-a-day

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August 1992

31 sheets · 155 questions · GCSE

August 1992 compilationAll answers

Every sheet in August 1992

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 1992Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  2. 2nd August 1992State one example of a file format that commonly uses lossy compression.
  3. 3rd August 1992State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  4. 4th August 1992State whether the source code of proprietary (closed source) software is normally available for the public to view.
  5. 5th August 1992Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  6. 6th August 1992A 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.
  7. 7th August 1992Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  8. 8th August 1992Define the term protocol.
  9. 9th August 1992Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  10. 10th August 1992A 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;
  11. 11th August 1992Each 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.
  12. 12th August 1992Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  13. 13th August 1992State the two values a Boolean data type can hold.
  14. 14th August 1992Convert the 8-bit binary number 01011010 to denary.
  15. 15th August 1992Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  16. 16th August 1992Explain the purpose of a breakpoint.
  17. 17th August 1992Convert the hexadecimal number 1A to denary.
  18. 18th August 1992Convert the denary number 156 to an 8 bit binary number.
  19. 19th August 1992Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  20. 20th August 1992Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  21. 21st August 1992An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  22. 22nd August 1992A 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.
  23. 23rd August 1992Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  24. 24th August 1992Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  25. 25th August 1992Write 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.
  26. 26th August 1992A 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.
  27. 27th August 1992Name the four layers of the TCP/IP model in order from the one closest to the user.
  28. 28th August 1992Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  29. 29th August 1992State what a foreign key is used for.
  30. 30th August 1992Define the term 'interrupt' as used to describe a signal received by a CPU.
  31. 31st August 1992An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.