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Daily Practice · GCSE Computer Science

July 1953 5-a-day

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July 1953

31 sheets · 155 questions · GCSE

July 1953 compilationAll answers

Every sheet in July 1953

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

  1. 1st July 1953Given A = 1 and B = 1, state the value of A AND B.
  2. 2nd July 1953Convert the 8-bit binary number 01011010 to denary.
  3. 3rd July 1953Define a peer-to-peer network.
  4. 4th July 1953Describe what syntax highlighting is and how it helps a programmer.
  5. 5th July 1953Convert the denary number 5 to a 4-bit binary number.
  6. 6th July 1953A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  7. 7th July 1953A 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.
  8. 8th July 1953Trace 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).
  9. 9th July 1953A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  10. 10th July 1953State the type of program that is typically stored in ROM.
  11. 11th July 1953State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  12. 12th July 1953A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  13. 13th July 1953Write 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.
  14. 14th July 1953State the typical maximum capacity of a single-layer DVD.
  15. 15th July 1953Explain the role of TCP when a large file is downloaded.
  16. 16th July 1953State what is meant by a syntax error.
  17. 17th July 1953State what a foreign key is used for.
  18. 18th July 1953What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  19. 19th July 1953Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  20. 20th July 1953Given P = 0 and Q = 1, state the value of P OR Q.
  21. 21st July 1953A 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.
  22. 22nd July 1953A 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.
  23. 23rd July 1953Give one advantage and one disadvantage of using a compiler.
  24. 24th July 1953Convert the 4-bit binary number 1101 to denary.
  25. 25th July 1953Two 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.
  26. 26th July 1953State why an organisation might employ penetration testers to test its network.
  27. 27th July 1953Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  28. 28th July 1953State one example of a file format that commonly uses lossy compression.
  29. 29th July 1953State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  30. 30th July 1953State whether the source code of proprietary (closed source) software is normally available for the public to view.
  31. 31st July 1953Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.