Daily Practice · GCSE Computer Science
February 2025 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in February 2025, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in February 2025
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st February 2025Convert the hexadecimal number 1A to denary.
- 2nd February 2025Convert the denary number 156 to an 8 bit binary number.
- 3rd February 2025Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 4th February 2025An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 5th February 2025An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 6th February 2025A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
- 7th February 2025Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 8th February 2025Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 9th February 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.
- 10th February 2025A company backs up its files onto magnetic tape cartridges, each with a capacity of 3 TB. The company needs to back up 20 TB of data. Calculate the minimum number of cartridges needed.
- 11th February 2025State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 12th February 2025Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 13th February 2025State what a foreign key is used for.
- 14th February 2025Define the term 'interrupt' as used to describe a signal received by a CPU.
- 15th February 2025An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
- 16th February 2025Evaluate X = NOT A AND B when A = 0 and B = 1.
- 17th February 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.
- 18th February 2025Give one advantage of a star topology compared with a mesh topology.
- 19th February 2025State why a program written in a high level language must be translated.
- 20th February 2025Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 21st February 2025State the three stages of the fetch-decode-execute cycle in the order they occur.
- 22nd February 2025State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 23rd February 2025Describe what a nested loop does when it processes a 2D array.
- 24th February 2025Define the term 'pixel'.
- 25th February 2025Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 26th February 2025Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 27th February 2025Evaluate the expression 23 DIV 4.
- 28th February 2025State the value returned by LENGTH(word) if word stores the string 'Computer'.