Revision Library
/Subjects/Computer Science/Daily Practice
Daily Practice · GCSE Computer Science

February 1980 5-a-day

← Today's GCSE Computer Science sheet

February 1980

29 sheets · 145 questions · GCSE

February 1980 compilationAll answers

Every sheet in February 1980

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

  1. 1st February 1980A 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 February 1980Describe what syntax highlighting is and how it helps a programmer.
  3. 3rd February 1980Convert the 4-bit binary number 1101 to denary.
  4. 4th February 1980Two 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 February 1980State why an organisation might employ penetration testers to test its network.
  6. 6th February 1980Trace 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).
  7. 7th February 1980State one example of a file format that commonly uses lossy compression.
  8. 8th February 1980State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  9. 9th February 1980State whether the source code of proprietary (closed source) software is normally available for the public to view.
  10. 10th February 1980Write 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 February 1980A 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 February 1980Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  13. 13th February 1980Explain the role of TCP when a large file is downloaded.
  14. 14th February 1980Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  15. 15th February 1980A 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 February 1980Each 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 February 1980Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  18. 18th February 1980State the two values a Boolean data type can hold.
  19. 19th February 1980Convert the 8-bit binary number 01011010 to denary.
  20. 20th February 1980Calculate 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 February 1980Give one advantage and one disadvantage of using a compiler.
  22. 22nd February 1980Convert the hexadecimal number 1A to denary.
  23. 23rd February 1980Convert the denary number 156 to an 8 bit binary number.
  24. 24th February 1980Which 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 February 1980Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  26. 26th February 1980An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  27. 27th February 1980A 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 February 1980Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  29. 29th February 1980Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.