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Daily Practice · GCSE Computer Science

January 1956 5-a-day

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January 1956

31 sheets · 155 questions · GCSE

January 1956 compilationAll answers

Every sheet in January 1956

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

  1. 1st January 1956Define a peer-to-peer network.
  2. 2nd January 1956Explain why an interpreter is often preferred while a program is being written.
  3. 3rd January 1956Convert the denary number 5 to a 4-bit binary number.
  4. 4th January 1956A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  5. 5th January 1956A simple cipher shifts every letter 2 places forward in the alphabet, wrapping around so Y becomes A and Z becomes B. Encrypt the plaintext CAT using this cipher.
  6. 6th January 1956A 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 January 1956A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  8. 8th January 1956State the type of program that is typically stored in ROM.
  9. 9th January 1956State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  10. 10th January 1956A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  11. 11th January 1956Write 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.
  12. 12th January 1956State the typical maximum capacity of a single-layer DVD.
  13. 13th January 1956State the layer that IP operates in, and describe its job.
  14. 14th January 1956State what is meant by a syntax error.
  15. 15th January 1956State what a foreign key is used for.
  16. 16th January 1956What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  17. 17th January 1956Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  18. 18th January 1956Given P = 0 and Q = 1, state the value of P OR Q.
  19. 19th January 1956A pseudocode algorithm is: count <- 0, x <- 10, WHILE x > 0, count <- count + 1, x <- x - 3, ENDWHILE, OUTPUT count. Complete a trace table for x and count, laid out as x | count, then state the value output.
  20. 20th January 1956A 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.
  21. 21st January 1956Describe what syntax highlighting is and how it helps a programmer.
  22. 22nd January 1956Convert the 4-bit binary number 1101 to denary.
  23. 23rd January 1956Two 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.
  24. 24th January 1956State why an organisation might employ penetration testers to test its network.
  25. 25th January 1956Trace 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 January 1956State one example of a file format that commonly uses lossy compression.
  27. 27th January 1956State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  28. 28th January 1956State whether the source code of proprietary (closed source) software is normally available for the public to view.
  29. 29th January 1956Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  30. 30th January 1956State the value returned by LENGTH(word) if word stores the string 'Computer'.
  31. 31st January 1956Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.