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Daily Practice · GCSE Computer Science

August 1972 5-a-day

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August 1972

31 sheets · 155 questions · GCSE

August 1972 compilationAll answers

Every sheet in August 1972

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 1972What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  2. 2nd August 1972Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  3. 3rd August 1972Given P = 0 and Q = 1, state the value of P OR Q.
  4. 4th August 1972Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  5. 5th August 1972A 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.
  6. 6th August 1972Explain the purpose of a breakpoint.
  7. 7th August 1972Convert the 4-bit binary number 1101 to denary.
  8. 8th August 1972Two 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.
  9. 9th August 1972State why an organisation might employ penetration testers to test its network.
  10. 10th August 1972Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  11. 11th August 1972State one example of a file format that commonly uses lossy compression.
  12. 12th August 1972State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  13. 13th August 1972State whether the source code of proprietary (closed source) software is normally available for the public to view.
  14. 14th August 1972Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  15. 15th August 1972A 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.
  16. 16th August 1972Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  17. 17th August 1972Name the four layers of the TCP/IP model in order from the one closest to the user.
  18. 18th August 1972Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  19. 19th August 1972A 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;
  20. 20th August 1972Each 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.
  21. 21st August 1972Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  22. 22nd August 1972State the two values a Boolean data type can hold.
  23. 23rd August 1972Convert the 8-bit binary number 01011010 to denary.
  24. 24th August 1972Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  25. 25th August 1972A 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.
  26. 26th August 1972Convert the hexadecimal number 1A to denary.
  27. 27th August 1972Convert the denary number 156 to an 8 bit binary number.
  28. 28th August 1972Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  29. 29th August 1972An array named temps holds 12 values. State the index of the first item and the index of the last item.
  30. 30th August 1972An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  31. 31st August 1972A 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.