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Daily Practice · GCSE Computer Science

January 1975 5-a-day

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January 1975

31 sheets · 155 questions · GCSE

January 1975 compilationAll answers

Every sheet in January 1975

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 1975Trace 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).
  2. 2nd January 1975An 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 January 1975Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  4. 4th January 1975Which piece of UK legislation controls how organisations must store and use people's personal data?
  5. 5th January 1975Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  6. 6th January 1975State the correct order of the three operations used to read data from a text file.
  7. 7th January 1975Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  8. 8th January 1975Explain the role of TCP when a large file is downloaded.
  9. 9th January 1975A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  10. 10th January 1975A 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 January 1975State one function carried out by the operating system of a computer.
  12. 12th January 1975In computational thinking, what is meant by the term 'decomposition'?
  13. 13th January 1975Given A = 1 and B = 1, state the value of A AND B.
  14. 14th January 1975Convert the denary number 200 to hexadecimal, showing your working.
  15. 15th January 1975Define a peer-to-peer network.
  16. 16th January 1975Give one advantage and one disadvantage of using a compiler.
  17. 17th January 1975Convert the denary number 5 to a 4-bit binary number.
  18. 18th January 1975A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  19. 19th January 1975A 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 January 1975Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  21. 21st January 1975A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  22. 22nd January 1975State the type of program that is typically stored in ROM.
  23. 23rd January 1975State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  24. 24th January 1975A 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 January 1975State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  26. 26th January 1975State the typical maximum capacity of a single-layer DVD.
  27. 27th January 1975A user reads the same email on a phone and a tablet, and deleting it on one deletes it on the other. Which protocol is in use and why?
  28. 28th January 1975State what is meant by a syntax error.
  29. 29th January 1975Define the term 'primary key' as used in a database table.
  30. 30th January 1975What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  31. 31st January 1975Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.