What does API stand for in software development?

• A. Application Programming Interface
• B. Application Protocol Interface
• C. Automation Programming Interface
• D. Active Programming Interface

Answer: (A)

An API is a defined way for software components to talk to each other. It stands for Application Programming Interface: Application refers to software applications, Programming means the code that calls into the API, and Interface describes the surface exposed to developers—the functions, methods, parameters, and data formats you use to interact with the provider. This abstraction lets you use features from a library, a web service, or the operating system without needing to know how it’s implemented behind the scenes. For example, a web service might offer a REST API to fetch data over HTTP, or a language’s standard library provides APIs you call to perform common tasks. The other proposed expansions aren’t how APIs are used in software development, so they don’t fit.