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Daily Practice · GCSE Computer Science

October 1957 5-a-day

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October 1957

31 sheets · 155 questions · GCSE

October 1957 compilationAll answers

Every sheet in October 1957

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

  1. 1st October 1957State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  2. 2nd October 1957A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  3. 3rd October 1957A table called books has fields bookId, title, authorId and copiesAvailable. Write an SQL statement that selects the title of every book with more than 2 copies available.
  4. 4th October 1957A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  5. 5th October 1957An array contains [9, 2, 6], to be sorted using insertion sort. Show the state of the array after each new element has been inserted into its correct position.
  6. 6th October 1957Complete: NOT 0 = ?
  7. 7th October 1957State how many different values can be represented using 5 bits, and explain your reasoning.
  8. 8th October 1957State what LAN stands for.
  9. 9th October 1957State why a program written in a high level language must be translated.
  10. 10th October 1957An 8-bit register stores the value 01100000 (denary 96). State the resulting 8-bit binary value after a left shift by 1 place, and state whether an overflow occurs.
  11. 11th October 1957Which CPU register holds the address of the next instruction to be fetched?
  12. 12th October 1957Distinguish between the network security threats known as phishing and pharming.
  13. 13th October 1957Describe what a nested loop does when it processes a 2D array.
  14. 14th October 1957A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  15. 15th October 1957A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  16. 16th October 1957A streaming company records which shows each user watches and uses this to recommend similar shows. Explain one ethical concern this could raise, even if the company only uses the data to improve recommendations.
  17. 17th October 1957State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  18. 18th October 1957State the key difference between a procedure and a function.
  19. 19th October 1957Give one example of an optical secondary storage device.
  20. 20th October 1957Give two reasons why network communication is divided into layers.
  21. 21st October 1957State the term used for realistic data that a program would be expected to handle during normal use.
  22. 22nd October 1957Give one advantage of a relational database over a flat-file database.
  23. 23rd October 1957State the difference between lossy and lossless compression.
  24. 24th October 1957State the condition that must be met before a binary search can be used on an array.
  25. 25th October 1957A 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.
  26. 26th October 1957Convert the hexadecimal number 3F to denary.
  27. 27th October 1957Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  28. 28th October 1957Explain why an interpreter is often preferred while a program is being written.
  29. 29th October 1957Convert the denary number 45 to hexadecimal.
  30. 30th October 1957What does the acronym CPU stand for?
  31. 31st October 1957State what the term malware means.