Select the correct answerAll methods must be implemented of an interface.OptionsTrueFalse

In object-oriented programming, particularly in languages like Java and C#, an interface is a reference type, similar to a class, that can contain only method signatures, properties, events, or indexers. When a class implements an interface, it agrees to provide concrete implementations for all the methods defined in that interface.

Breakdown of the Question

1. Definition of Interface: Understand what an interface is and its purpose in programming.
2. Implementation Requirement: Clarify whether all methods of the interface must be implemented in a class that claims to implement that interface.

Relevant Concepts

• Interface in OOP: It defines a contract that implementing classes must fulfill.
• Abstract Methods: Methods declared in an interface are abstract by default.
• Implementing Interfaces: If a class implements an interface, it must provide implementations for all of its methods.

Analysis and Detail

• True Statement: A class that implements an interface must implement all of its methods. This is to ensure that the class conforms to the contract specified by the interface.
• False Statement: If a class does not implement all the methods of an interface, it either cannot be compiled or must be declared as an abstract class.

Summary

In conclusion, in most object-oriented languages that support interfaces, it is true that all methods of an interface must be implemented by any class that implements that interface.

Final Answer

True