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Daily Practice · GCSE Computer Science

July 1977 5-a-day

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July 1977

31 sheets · 155 questions · GCSE

July 1977 compilationAll answers

Every sheet in July 1977

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 1977A 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.
  2. 2nd July 1977An uncompressed file is 6000 KB. After lossless compression it is 1500 KB. Calculate the compression ratio in the form n:1 (original size : compressed size).
  3. 3rd July 1977Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  4. 4th July 1977Which piece of UK legislation controls how organisations must store and use people's personal data?
  5. 5th July 1977Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  6. 6th July 1977State the correct order of the three operations used to read data from a text file.
  7. 7th July 1977Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  8. 8th July 1977State the layer that IP operates in, and describe its job.
  9. 9th July 1977A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  10. 10th July 1977A table called products has fields productId, name, price and stock. Write an SQL statement that changes the price of the product with productId 7 to 15.99.
  11. 11th July 1977State one function carried out by the operating system of a computer.
  12. 12th July 1977In computational thinking, what is meant by the term 'decomposition'?
  13. 13th July 1977Given A = 1 and B = 1, state the value of A AND B.
  14. 14th July 1977Convert the denary number 200 to hexadecimal, showing your working.
  15. 15th July 1977Define a peer-to-peer network.
  16. 16th July 1977Describe what syntax highlighting is and how it helps a programmer.
  17. 17th July 1977Convert the denary number 5 to a 4-bit binary number.
  18. 18th July 1977A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  19. 19th July 1977A 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.
  20. 20th July 1977Trace 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).
  21. 21st July 1977A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  22. 22nd July 1977State the type of program that is typically stored in ROM.
  23. 23rd July 1977State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  24. 24th July 1977A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  25. 25th July 1977State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  26. 26th July 1977State the typical maximum capacity of a single-layer DVD.
  27. 27th July 1977Explain the role of TCP when a large file is downloaded.
  28. 28th July 1977State what is meant by a syntax error.
  29. 29th July 1977Define the term 'primary key' as used in a database table.
  30. 30th July 1977What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  31. 31st July 1977Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.