Daily Practice · GCSE Computer Science
July 2023 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in July 2023, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in July 2023
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st July 2023State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 2nd July 2023Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 3rd July 2023A user reads the same email on a phone and a tablet, and deleting it on one deletes it on the other. Which protocol is in use and why?
- 4th July 2023Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 5th July 2023A 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.
- 6th July 2023Each 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.
- 7th July 2023Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 8th July 2023State the two values a Boolean data type can hold.
- 9th July 2023State how many different values can be represented using 5 bits, and explain your reasoning.
- 10th July 2023Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 11th July 2023Name the translator used for assembly language and describe how it differs from a compiler.
- 12th July 2023Convert the hexadecimal number 1A to denary.
- 13th July 2023Convert the denary number 156 to an 8 bit binary number.
- 14th July 2023Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 15th July 2023Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
- 16th July 2023An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 17th July 2023A 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.
- 18th July 2023Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 19th July 2023Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 20th July 2023State the key difference between a procedure and a function.
- 21st July 2023A 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.
- 22nd July 2023Define the term protocol.
- 23rd July 2023Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 24th July 2023Give one advantage of a relational database over a flat-file database.
- 25th July 2023Define the term 'interrupt' as used to describe a signal received by a CPU.
- 26th July 2023An 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.
- 27th July 2023Evaluate X = NOT A AND B when A = 0 and B = 1.
- 28th July 2023Convert the hexadecimal number 3F to denary.
- 29th July 2023Give one advantage of a star topology compared with a mesh topology.
- 30th July 2023Explain the purpose of a breakpoint.
- 31st July 2023Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.