Daily Practice · GCSE Computer Science
July 2025 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in July 2025, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in July 2025
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 2025State what LAN stands for.
- 2nd July 2025State why a program written in a high level language must be translated.
- 3rd July 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.
- 4th July 2025Which CPU register holds the address of the next instruction to be fetched?
- 5th July 2025Distinguish between the network security threats known as phishing and pharming.
- 6th July 2025Describe what a nested loop does when it processes a 2D array.
- 7th July 2025A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 8th July 2025A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 9th July 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.
- 10th July 2025State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 11th July 2025Write the pseudocode header and body for a function called isAdult that takes one integer parameter called age and returns True if age is 18 or over.
- 12th July 2025Give one example of an optical secondary storage device.
- 13th July 2025Give two reasons why network communication is divided into layers.
- 14th July 2025State the term used for realistic data that a program would be expected to handle during normal use.
- 15th July 2025State what a foreign key is used for.
- 16th July 2025State the difference between lossy and lossless compression.
- 17th July 2025State the condition that must be met before a binary search can be used on an array.
- 18th July 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.
- 19th July 2025A pseudocode algorithm is: count <- 0, x <- 10, WHILE x > 0, count <- count + 1, x <- x - 3, ENDWHILE, OUTPUT count. Complete a trace table for x and count, laid out as x | count, then state the value output.
- 20th July 2025Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 21st July 2025Explain why an interpreter is often preferred while a program is being written.
- 22nd July 2025Convert the denary number 45 to hexadecimal.
- 23rd July 2025What does the acronym CPU stand for?
- 24th July 2025State what the term malware means.
- 25th July 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.
- 26th July 2025An 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).
- 27th July 2025Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 28th July 2025Which piece of UK legislation controls how organisations must store and use people's personal data?
- 29th July 2025Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 30th July 2025State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 31st July 2025Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.