What is the definition of an interface in software terms?

• A. Data schema
• B. Point of interaction between components
• C. Middleware
• D. API

Answer: (B)

In software terms, an interface is the boundary where two components meet and communicate. It defines how they talk to each other, what services or data are available, and the rules for exchanging information across that boundary. This makes the statement about the interface being the point of interaction between components the best choice, because it directly captures where and how the interaction occurs.

Data schema describes how data is structured, not how components interact. Middleware is a software layer that helps different parts of a system talk to each other, but the interface itself is the point of interaction, not the supporting layer. An API is a specific kind of interface used to access a service, but the broader concept of an interface is the interaction point itself.