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Daily Practice · GCSE Computer Science

October 1964 5-a-day

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October 1964

31 sheets · 155 questions · GCSE

October 1964 compilationAll answers

Every sheet in October 1964

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

  1. 1st October 1964A 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.
  2. 2nd October 1964A 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.
  3. 3rd October 1964A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  4. 4th October 1964State the type of program that is typically stored in ROM.
  5. 5th October 1964State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  6. 6th October 1964A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  7. 7th October 1964Write 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.
  8. 8th October 1964State the typical maximum capacity of a single-layer DVD.
  9. 9th October 1964State the layer that IP operates in, and describe its job.
  10. 10th October 1964State what is meant by a syntax error.
  11. 11th October 1964State what a foreign key is used for.
  12. 12th October 1964What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  13. 13th October 1964Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  14. 14th October 1964Given P = 0 and Q = 1, state the value of P OR Q.
  15. 15th October 1964A 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.
  16. 16th October 1964A 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.
  17. 17th October 1964Describe what syntax highlighting is and how it helps a programmer.
  18. 18th October 1964Convert the 4-bit binary number 1101 to denary.
  19. 19th October 1964Two 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.
  20. 20th October 1964State why an organisation might employ penetration testers to test its network.
  21. 21st October 1964Trace 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).
  22. 22nd October 1964State one example of a file format that commonly uses lossy compression.
  23. 23rd October 1964State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  24. 24th October 1964State whether the source code of proprietary (closed source) software is normally available for the public to view.
  25. 25th October 1964Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  26. 26th October 1964State the value returned by LENGTH(word) if word stores the string 'Computer'.
  27. 27th October 1964Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  28. 28th October 1964Explain the role of TCP when a large file is downloaded.
  29. 29th October 1964Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  30. 30th October 1964A table called books has fields bookId, title, authorId and copiesAvailable. Write an SQL statement that selects the title of every book with more than 2 copies available.
  31. 31st October 1964Each 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.