Daily Practice · GCSE Computer Science
March 2025 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in March 2025, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in March 2025
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 2025A 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.
- 2nd March 2025Give two reasons why network communication is divided into layers.
- 3rd March 2025A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 4th March 2025A 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.
- 5th March 2025A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 6th March 2025An 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.
- 7th March 2025Complete: NOT 0 = ?
- 8th March 2025State how many different values can be represented using 5 bits, and explain your reasoning.
- 9th March 2025State what LAN stands for.
- 10th March 2025Explain why an interpreter is often preferred while a program is being written.
- 11th March 2025An 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.
- 12th March 2025Which CPU register holds the address of the next instruction to be fetched?
- 13th March 2025Distinguish between the network security threats known as phishing and pharming.
- 14th March 2025A 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.
- 15th March 2025A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 16th March 2025A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 17th March 2025A 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.
- 18th March 2025State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 19th March 2025State the key difference between a procedure and a function.
- 20th March 2025Give one example of an optical secondary storage device.
- 21st March 2025State the layer that IP operates in, and describe its job.
- 22nd March 2025State the term used for realistic data that a program would be expected to handle during normal use.
- 23rd March 2025Give one advantage of a relational database over a flat-file database.
- 24th March 2025State the difference between lossy and lossless compression.
- 25th March 2025State the condition that must be met before a binary search can be used on an array.
- 26th March 2025A 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.
- 27th March 2025Convert the hexadecimal number 3F to denary.
- 28th March 2025Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 29th March 2025Describe what syntax highlighting is and how it helps a programmer.
- 30th March 2025Convert the denary number 45 to hexadecimal.
- 31st March 2025What does the acronym CPU stand for?