The primary purpose of a version control system is to maintain a history of changes to code files, allowing developers to track the evolution of the codebase, compare different versions, and revert to previous states if necessary.

Git is a distributed version control system, meaning that each developer has a complete copy of the repository on their local machine. This allows for offline work and easier collaboration, as developers can push and pull changes from each other's repositories directly.

Merging is the process of combining changes from different branches into a single branch. This allows developers to integrate their work and create a unified codebase.

The git checkout -b command is used to create a new branch in Git. It takes the name of the new branch as an argument and creates it based on the current commit.

Code reviews serve multiple purposes, including identifying potential bugs and defects, ensuring adherence to coding standards and best practices, and facilitating knowledge sharing and collaboration among developers.

Subversion is a centralized version control system, meaning that there is a single central repository where all changes are stored. Developers check out a working copy from the central repository, make changes, and then commit their changes back to the central repository.

Collaborative development tools like GitHub and Bitbucket offer multiple benefits, including enabling multiple developers to work on the same codebase simultaneously, facilitating code reviews and collaboration, and providing a centralized platform for issue tracking and project management.

Feature Branching is a branching strategy where a separate branch is created for each feature or bug fix. This allows developers to work on multiple features or bug fixes in parallel without affecting the main branch.

Commit messages serve multiple purposes, including providing a brief description of the changes being committed, helping other developers understand the context and rationale behind the changes, and facilitating code reviews and collaboration.

Jenkins, Travis CI, and CircleCI are all popular tools used for continuous integration and continuous delivery (CI/CD) in software development. They automate the process of building, testing, and deploying code changes, enabling faster and more reliable software delivery.

Continuous integration aims to achieve multiple goals, including identifying and fixing bugs early in the development process, ensuring that code changes from different developers integrate smoothly, and automating the process of building and testing code changes.

Subversion is a centralized version control system, meaning that there is a single central repository where all changes are stored. Developers check out a working copy from the central repository, make changes, and then commit their changes back to the central repository.

Pull requests serve multiple purposes in collaborative development, including proposing changes to a codebase for review and merging, facilitating discussions and feedback on code changes, and allowing multiple developers to work on the same codebase simultaneously.

Release Branching is a branching strategy where a long-lived branch is created for each major release of a software product. This allows developers to work on bug fixes and minor enhancements for a specific release without affecting the main development branch.

Version control systems offer multiple benefits in software development, including allowing multiple developers to work on the same codebase simultaneously, facilitating code reviews and collaboration, and enabling easy deployment and rollback of code changes.