Programming Concepts Beginner

What is Version Control?

A system that records changes to files over time, allowing you to recall specific versions, collaborate, and track history.

Version control tracks every modification to code in a special database. If a mistake is made, developers can revert to earlier versions. It enables collaboration by merging changes from multiple contributors.

Git is the most popular version control system. Key concepts include repositories, commits, branches, merges, and pull requests. Centralized systems (SVN) use a single server, while distributed systems (Git) give each developer a full copy.

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Related Terms

The implied cost of additional rework caused by choosing a quick solution now instead of a better approach that would take longer.

A reusable solution template for commonly occurring problems in software design.

SOLID Principles

Five design principles for writing maintainable, flexible object-oriented code: Single Responsibility, Open-Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion.

A mathematical notation that describes the worst-case performance of an algorithm as input size grows.

Twelve-Factor App

A methodology of twelve best practices for building modern, scalable, maintainable software-as-a-service applications.

Code that is easy to read, understand, and maintain — following consistent conventions, meaningful naming, and single-responsibility functions.

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