Daily Practice · GCSE Computer Science
April 2022 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in April 2022, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in April 2022
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2022State the value returned by LENGTH(word) if word stores the string 'Computer'.
- 2nd April 2022Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
- 3rd April 2022Give two reasons why network communication is divided into layers.
- 4th April 2022Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
- 5th April 2022A 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 April 2022Each 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 April 2022Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
- 8th April 2022State the two values a Boolean data type can hold.
- 9th April 2022State how many different values can be represented using 5 bits, and explain your reasoning.
- 10th April 2022Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 11th April 2022Explain why an interpreter is often preferred while a program is being written.
- 12th April 2022Convert the hexadecimal number 1A to denary.
- 13th April 2022Convert the denary number 156 to an 8 bit binary number.
- 14th April 2022Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
- 15th April 2022A 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.
- 16th April 2022An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
- 17th April 2022A 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 April 2022Describe two negative consequences of throwing away old computer hardware instead of recycling it.
- 19th April 2022Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
- 20th April 2022State the key difference between a procedure and a function.
- 21st April 2022A 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 April 2022State the layer that IP operates in, and describe its job.
- 23rd April 2022Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
- 24th April 2022Give one advantage of a relational database over a flat-file database.
- 25th April 2022Define the term 'interrupt' as used to describe a signal received by a CPU.
- 26th April 2022An 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 April 2022Evaluate X = NOT A AND B when A = 0 and B = 1.
- 28th April 2022Convert the hexadecimal number 3F to denary.
- 29th April 2022Give one advantage of a star topology compared with a mesh topology.
- 30th April 2022Describe what syntax highlighting is and how it helps a programmer.