Daily Practice · GCSE Computer Science
May 2025 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in May 2025, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in May 2025
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st May 2025What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 2nd May 2025Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 3rd May 2025Given P = 0 and Q = 1, state the value of P OR Q.
- 4th May 2025Convert the hexadecimal number FF to an 8-bit binary number.
- 5th May 2025A network administrator is connecting 10 computers in a server room. Calculate the number of cables needed for a full mesh topology, and state the number needed for a star topology with one central switch.
- 6th May 2025Name the translator used for assembly language and describe how it differs from a compiler.
- 7th May 2025Convert the 4-bit binary number 1101 to denary.
- 8th May 2025Two CPUs are compared for a task optimised for multiple cores: CPU A has 2 cores at 4.2 GHz; CPU B has 6 cores at 3.0 GHz. Explain which CPU is likely to perform better for this task.
- 9th May 2025State why an organisation might employ penetration testers to test its network.
- 10th May 2025Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 11th May 2025State one example of a file format that commonly uses lossy compression.
- 12th May 2025State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 13th May 2025State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 14th May 2025Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
- 15th May 2025State the correct order of the three operations used to read data from a text file.
- 16th May 2025Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 17th May 2025Define the term protocol.
- 18th May 2025Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 19th May 2025A table called products has fields productId, name, price and stock. Write an SQL statement that changes the price of the product with productId 7 to 15.99.
- 20th May 2025Each pair from the previous question is stored using 2 bytes. Calculate the compression ratio achieved, given the uncompressed row (1 byte per pixel) uses 8 bytes.
- 21st May 2025Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 22nd May 2025State the two values a Boolean data type can hold.
- 23rd May 2025Convert the denary number 200 to hexadecimal, showing your working.
- 24th May 2025Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 25th May 2025Explain the purpose of a breakpoint.
- 26th May 2025Convert the hexadecimal number 1A to denary.
- 27th May 2025Convert the denary number 156 to an 8 bit binary number.
- 28th May 2025Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 29th May 2025Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 30th May 2025An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 31st May 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.