5.1 Explain source control concepts.

Concepts

Version management

Tracking every revision so you can compare, audit and roll back.

Code review

Another person reviews changes before they are merged; catches bugs and security flaws.

Pull request

A request to merge a branch, where review, discussion and automated checks happen.

Code push

Sending local commits to a shared remote repository.

Code commit

Recording a set of changes with a message in the local history.

Code merge

Combining changes from one branch into another, resolving conflicts.

Branch management

Strategies and rules for branches: protected main branch, required reviews, short-lived feature branches.