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Daily Practice · GCSE Computer Science

January 1955 5-a-day

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January 1955

31 sheets · 155 questions · GCSE

January 1955 compilationAll answers

Every sheet in January 1955

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 1955State the difference between lossy and lossless compression.
  2. 2nd January 1955State the condition that must be met before a binary search can be used on an array.
  3. 3rd January 1955A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
  4. 4th January 1955Convert the hexadecimal number FF to an 8-bit binary number.
  5. 5th January 1955Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  6. 6th January 1955Give one advantage and one disadvantage of using a compiler.
  7. 7th January 1955Convert the denary number 45 to hexadecimal.
  8. 8th January 1955What does the acronym CPU stand for?
  9. 9th January 1955State what the term malware means.
  10. 10th January 1955Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
  11. 11th January 1955An 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).
  12. 12th January 1955Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  13. 13th January 1955Which piece of UK legislation controls how organisations must store and use people's personal data?
  14. 14th January 1955Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  15. 15th January 1955State the correct order of the three operations used to read data from a text file.
  16. 16th January 1955Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  17. 17th January 1955A 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?
  18. 18th January 1955A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  19. 19th January 1955A 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.
  20. 20th January 1955State one function carried out by the operating system of a computer.
  21. 21st January 1955In computational thinking, what is meant by the term 'decomposition'?
  22. 22nd January 1955Given A = 1 and B = 1, state the value of A AND B.
  23. 23rd January 1955Convert the denary number 200 to hexadecimal, showing your working.
  24. 24th January 1955Define a peer-to-peer network.
  25. 25th January 1955Name the translator used for assembly language and describe how it differs from a compiler.
  26. 26th January 1955Convert the denary number 5 to a 4-bit binary number.
  27. 27th January 1955A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
  28. 28th January 1955A 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.
  29. 29th January 1955Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  30. 30th January 1955A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
  31. 31st January 1955State the type of program that is typically stored in ROM.