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Daily Practice · GCSE Computer Science

March 1978 5-a-day

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March 1978

31 sheets · 155 questions · GCSE

March 1978 compilationAll answers

Every sheet in March 1978

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

  1. 1st March 1978State why a program written in a high level language must be translated.
  2. 2nd March 1978Convert the denary number 5 to a 4-bit binary number.
  3. 3rd March 1978A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  4. 4th March 1978A 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.
  5. 5th March 1978Describe what a nested loop does when it processes a 2D array.
  6. 6th March 1978A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  7. 7th March 1978State the type of program that is typically stored in ROM.
  8. 8th March 1978State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  9. 9th March 1978A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  10. 10th March 1978State the key difference between a procedure and a function.
  11. 11th March 1978State the typical maximum capacity of a single-layer DVD.
  12. 12th March 1978Give two reasons why network communication is divided into layers.
  13. 13th March 1978State what is meant by a syntax error.
  14. 14th March 1978Give one advantage of a relational database over a flat-file database.
  15. 15th March 1978What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  16. 16th March 1978Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  17. 17th March 1978Given P = 0 and Q = 1, state the value of P OR Q.
  18. 18th March 1978Convert the hexadecimal number 3F to denary.
  19. 19th March 1978A 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.
  20. 20th March 1978Explain why an interpreter is often preferred while a program is being written.
  21. 21st March 1978Convert the 4-bit binary number 1101 to denary.
  22. 22nd March 1978Two 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.
  23. 23rd March 1978State why an organisation might employ penetration testers to test its network.
  24. 24th March 1978A 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.
  25. 25th March 1978State one example of a file format that commonly uses lossy compression.
  26. 26th March 1978State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  27. 27th March 1978State whether the source code of proprietary (closed source) software is normally available for the public to view.
  28. 28th March 1978Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  29. 29th March 1978A programmer wants any syntax error in their program to be reported before the program starts running at all. State whether a compiler or an interpreter behaves this way, and explain why.
  30. 30th March 1978Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  31. 31st March 1978State the layer that IP operates in, and describe its job.