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Daily Practice · GCSE Computer Science

August 1977 5-a-day

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August 1977

31 sheets · 155 questions · GCSE

August 1977 compilationAll answers

Every sheet in August 1977

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 1977Given P = 0 and Q = 1, state the value of P OR Q.
  2. 2nd August 1977Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  3. 3rd August 1977A 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.
  4. 4th August 1977Give one advantage and one disadvantage of using a compiler.
  5. 5th August 1977Convert the 4-bit binary number 1101 to denary.
  6. 6th August 1977Two 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.
  7. 7th August 1977State why an organisation might employ penetration testers to test its network.
  8. 8th August 1977Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  9. 9th August 1977State one example of a file format that commonly uses lossy compression.
  10. 10th August 1977State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  11. 11th August 1977State whether the source code of proprietary (closed source) software is normally available for the public to view.
  12. 12th August 1977Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  13. 13th August 1977A 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.
  14. 14th August 1977Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  15. 15th August 1977A 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?
  16. 16th August 1977Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  17. 17th August 1977A 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;
  18. 18th August 1977Each 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.
  19. 19th August 1977Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  20. 20th August 1977State the two values a Boolean data type can hold.
  21. 21st August 1977Convert the 8-bit binary number 01011010 to denary.
  22. 22nd August 1977Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  23. 23rd August 1977Name the translator used for assembly language and describe how it differs from a compiler.
  24. 24th August 1977Convert the hexadecimal number 1A to denary.
  25. 25th August 1977Convert the denary number 156 to an 8 bit binary number.
  26. 26th August 1977Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  27. 27th August 1977Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  28. 28th August 1977An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  29. 29th August 1977A 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.
  30. 30th August 1977Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  31. 31st August 1977Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.