Daily Practice - GCSE Computer Science
Systems, data representation, networks, algorithms and programming.
3rd March 2025
- 1Producing Robust Programs
A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 2Boolean Logic
A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
- 3Data Representation: Number Systems
Convert the denary number 5 to a 4-bit binary number.
- 4Data Representation: Images, Sound and Compression
State one example of a file format that commonly uses lossy compression.
- 5Programming Practice: Writing and Refining Programs
State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
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