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Daily Practice · GCSE Computer Science

April 1991 5-a-day

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April 1991

30 sheets · 150 questions · GCSE

April 1991 compilationAll answers

Every sheet in April 1991

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

  1. 1st April 1991Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  2. 2nd April 1991State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  3. 3rd April 1991A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  4. 4th April 1991A 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.
  5. 5th April 1991State one function carried out by the operating system of a computer.
  6. 6th April 1991In computational thinking, what is meant by the term 'decomposition'?
  7. 7th April 1991Given A = 1 and B = 1, state the value of A AND B.
  8. 8th April 1991Convert the denary number 200 to hexadecimal, showing your working.
  9. 9th April 1991Define a peer-to-peer network.
  10. 10th April 1991State why a program written in a high level language must be translated.
  11. 11th April 1991Convert the denary number 5 to a 4-bit binary number.
  12. 12th April 1991A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  13. 13th April 1991A 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.
  14. 14th April 1991Describe what a nested loop does when it processes a 2D array.
  15. 15th April 1991A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  16. 16th April 1991State the type of program that is typically stored in ROM.
  17. 17th April 1991State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
  18. 18th April 1991A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  19. 19th April 1991State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  20. 20th April 1991State the typical maximum capacity of a single-layer DVD.
  21. 21st April 1991Give two reasons why network communication is divided into layers.
  22. 22nd April 1991State what is meant by a syntax error.
  23. 23rd April 1991Define the term 'primary key' as used in a database table.
  24. 24th April 1991What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  25. 25th April 1991Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  26. 26th April 1991Given P = 0 and Q = 1, state the value of P OR Q.
  27. 27th April 1991Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  28. 28th April 1991A 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.
  29. 29th April 1991Explain why an interpreter is often preferred while a program is being written.
  30. 30th April 1991Convert the 4-bit binary number 1101 to denary.