Revision Library
/Subjects/Computer Science/Daily Practice
Daily Practice · GCSE Computer Science

April 1955 5-a-day

← Today's GCSE Computer Science sheet

April 1955

30 sheets · 150 questions · GCSE

April 1955 compilationAll answers

Every sheet in April 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 April 1955State the value returned by LENGTH(word) if word stores the string 'Computer'.
  2. 2nd April 1955A 1 TB hard disk drive costs 40 pounds. A 500 GB solid-state drive costs 60 pounds. Calculate the cost per gigabyte of each device, and state which is cheaper per GB. Use 1 TB = 1000 GB.
  3. 3rd April 1955Give two reasons why network communication is divided into layers.
  4. 4th April 1955A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  5. 5th April 1955A 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.
  6. 6th April 1955A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  7. 7th April 1955An 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.
  8. 8th April 1955Complete: NOT 0 = ?
  9. 9th April 1955State how many different values can be represented using 5 bits, and explain your reasoning.
  10. 10th April 1955State what LAN stands for.
  11. 11th April 1955Explain why an interpreter is often preferred while a program is being written.
  12. 12th April 1955An 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.
  13. 13th April 1955Which CPU register holds the address of the next instruction to be fetched?
  14. 14th April 1955Distinguish between the network security threats known as phishing and pharming.
  15. 15th April 1955A 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.
  16. 16th April 1955A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  17. 17th April 1955A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  18. 18th April 1955A 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.
  19. 19th April 1955State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  20. 20th April 1955State the key difference between a procedure and a function.
  21. 21st April 1955Give one example of an optical secondary storage device.
  22. 22nd April 1955State the layer that IP operates in, and describe its job.
  23. 23rd April 1955State the term used for realistic data that a program would be expected to handle during normal use.
  24. 24th April 1955Give one advantage of a relational database over a flat-file database.
  25. 25th April 1955State the difference between lossy and lossless compression.
  26. 26th April 1955State the condition that must be met before a binary search can be used on an array.
  27. 27th April 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.
  28. 28th April 1955Convert the hexadecimal number 3F to denary.
  29. 29th April 1955Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  30. 30th April 1955Describe what syntax highlighting is and how it helps a programmer.