Which statement about the relationship between classes and objects is correct?

Which statement about the relationship between classes and objects is correct?

• A. An object is a blueprint for creating classes
• B. A class is a blueprint for creating objects
• C. Classes and objects are unrelated
• D. A class is a type of interface

Answer: (B)

A class defines the blueprint for objects. It specifies the data each object can hold (attributes) and the operations it can perform (methods). An object is a concrete instance created from that blueprint, with its own state. You instantiate a class to produce objects, and those objects share the structure and behavior described by the class but can hold different data values. That’s why the statement is the best fit: it captures the essential relationship between the two concepts in object-oriented programming. The idea that an object is the blueprint for creating classes is backward, and the notion that classes and objects are unrelated is false. The idea that a class is a type of interface is also not accurate, since an interface is a separate construct used to specify a contract that classes may implement.

A class defines the blueprint for objects. It specifies the data each object can hold (attributes) and the operations it can perform (methods). An object is a concrete instance created from that blueprint, with its own state. You instantiate a class to produce objects, and those objects share the structure and behavior described by the class but can hold different data values.

That’s why the statement is the best fit: it captures the essential relationship between the two concepts in object-oriented programming. The idea that an object is the blueprint for creating classes is backward, and the notion that classes and objects are unrelated is false. The idea that a class is a type of interface is also not accurate, since an interface is a separate construct used to specify a contract that classes may implement.