Daily Practice · GCSE Computer Science

Daily Practice - GCSE Computer Science

Systems, data representation, networks, algorithms and programming.

20th April 2025

5 questions · GCSE · 123 questions in this band

1
Network Security
A simple cipher shifts every letter 2 places forward in the alphabet, wrapping around so Y becomes A and Z becomes B. Encrypt the plaintext CAT using this cipher.
2
Ethical, Legal, Cultural and Environmental Impact
State whether the source code of proprietary (closed source) software is normally available for the public to view.
3
Network Protocols and Layers
Define the term protocol.
4
Algorithms
An array contains [9, 2, 6], to be sorted using insertion sort. Show the state of the array after each new element has been inserted into its correct position.
5
Translators and Integrated Development Environments (IDEs)
A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.

You are looking at an earlier sheet. Today's sheet is the one that adds a day.

Your run is kept in this browser only, and there is no account.

Every sheet is deterministic: the same date always regenerates the same five questions. All of April 2025, including the monthly compilation PDF.