OOP Concept Java

Which keyword is used in Java to indicate that a class is inheriting properties from another class?

• implements

• extends

• inheritance

• inherits

What is the term used to describe the relationship between a subclass and a superclass in Java?

• aggregation

• association

• inheritance

• extends

Which keyword is used to implement method overriding in Java?

• extends

• implements

• override

• super

What is polymorphism in Java?

• The ability of an object to take on many forms.

• The ability of a class to have multiple constructors.

• The ability of a class to have multiple methods with the same name.

• he ability of a method to call itself.

What is an abstract method in Java?

• A method with a body.

• A method without a body.

• A method that cannot be called directly.

• A method that cannot be overridden.

Which keyword is used to implement an interface in Java?

• class

• interface

• implements

• extends

Can a class implement multiple interfaces in Java?

• No, a class can only implement one interface.

• Yes, a class can implement multiple interfaces.

• Only abstract classes can implement multiple interfaces.

• Only interfaces can implement other interfaces.

What is the purpose of an interface in Java?

• To define a contract that the implementing class must follow.

• To define a set of predefined methods that can be used by any class.

• To define a set of rules for inheritance.

• To define a set of rules for method overriding.

Which keyword is used to implement method overloading in Java?

• extends

• overloads

• override

• None of the above

Can an interface extend another interface in Java?

• No, an interface cannot extend another interface.

• Yes, an interface can extend another interface using the "extends" keyword.

• Only abstract classes can extend interfaces.

• Only classes can extend interfaces.