Knowledge

Concepts

Fundamental ideas that connect technologies, skills, and the work you do with them.

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Named references used to store and work with values in a program.

Reusable blocks of logic that receive inputs, perform work, and can return results.

The rules that determine where variables and other identifiers can be accessed.

Structured collections of related data and behavior represented through properties and methods.

Patterns for handling work that completes independently of the current execution flow.

The application-layer protocol used for communication between clients and servers on the web.

Interfaces that allow software systems to communicate and exchange data or capabilities.

A system for tracking changes to files and coordinating work across different versions.