In object-oriented programming, what encapsulates data and the operations that manipulate that data?

• A. Object
• B. Class
• C. Module
• D. Interface

Answer: (A)

Encapsulation in object-oriented programming means bundling data with the operations that work on that data into a single unit. The thing that does this is an object. An object holds its state (data) and the behavior (methods) that operate on that state, all together, often with controlled access to internal data.

A class is the blueprint that defines what data and methods exist, but the actual data lives inside an object created from that class. A module is a separate unit of code that groups functions and values, not a runtime bundle of data and behavior. An interface specifies a contract of methods without implementing or storing data.

So, the object is the entity that encapsulates both the data and the operations that manipulate that data.