Select the correct answerWhat type of methods an interface contain by default?Optionsstaticabstractfinalprivate

To determine the correct answer regarding what type of methods an interface contains by default, we need to examine the characteristics of interfaces in programming, specifically in languages like Java.

1. Understanding Interfaces

Interfaces in Java are used to define a contract that implementing classes must fulfill. They can declare methods, which means that any class implementing the interface must provide the implementation for these methods.

2. Types of Methods in Interfaces

• Static methods: While static methods can exist in interfaces, they are not part of the default behavior and don't need to be overridden by implementing classes.
• Abstract methods: By default, all methods declared in an interface are abstract, meaning they do not have a body and must be implemented by any class that uses the interface.
• Final methods: This concept does not apply to interface methods because final methods cannot be overridden, which contradicts the purpose of an interface.
• Private methods: While Java 9 and onward supports private methods in interfaces, they are not applicable to the interfaces' default behavior or requirement; they are used internally within the interface itself.

Conclusion

The only type of method that an interface contains by default and requires implementing classes to define is abstract methods.

Final Answer

abstract