Daily Practice · GCSE Computer Science
October 2024 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in October 2024, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in October 2024
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st October 2024State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 2nd October 2024Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 3rd October 2024A 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.
- 4th October 2024Each 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.
- 5th October 2024Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 6th October 2024State the two values a Boolean data type can hold.
- 7th October 2024State how many different values can be represented using 5 bits, and explain your reasoning.
- 8th October 2024Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 9th October 2024State why a program written in a high level language must be translated.
- 10th October 2024Convert the hexadecimal number 1A to denary.
- 11th October 2024Convert the denary number 156 to an 8 bit binary number.
- 12th October 2024Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 13th October 2024Describe what a nested loop does when it processes a 2D array.
- 14th October 2024An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 15th October 2024A 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.
- 16th October 2024Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 17th October 2024Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 18th October 2024State the key difference between a procedure and a function.
- 19th October 2024A 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.
- 20th October 2024Give two reasons why network communication is divided into layers.
- 21st October 2024Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 22nd October 2024Give one advantage of a relational database over a flat-file database.
- 23rd October 2024Define the term 'interrupt' as used to describe a signal received by a CPU.
- 24th October 2024An 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.
- 25th October 2024Evaluate X = NOT A AND B when A = 0 and B = 1.
- 26th October 2024Convert the hexadecimal number 3F to denary.
- 27th October 2024Give one advantage of a star topology compared with a mesh topology.
- 28th October 2024Explain why an interpreter is often preferred while a program is being written.
- 29th October 2024Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 30th October 2024State the three stages of the fetch-decode-execute cycle in the order they occur.
- 31st October 2024State one weakness of a simple shift cipher compared to modern encryption methods used on networks.