Question: This question is aboiut Java programming. Suppose A is an interface, B is a concrete class with a default constructor and it implements A. Which

This question is aboiut Java programming.

Suppose A is an interface, B is a concrete class with a default constructor and it implements A. Which of the following is correct? There may be more than one correct otion

A a = new A();

A a = new B();

B b = new A();

B b = new B();

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