The following method ,creating the object of B that refers to A will call the meth() in Class B.

Question: Class A{
Public void meth(){
}
}

class B extends A{
Public void meth(){
}
public static void main(String args[]){
A a=new B();
a.meth();
}
}

Whenever a subclass needs to refer to its immediate superclass, it can do so by use of the keyword ‘super’ .

No if you want to really call a method in Derived Class then it is only possible if that method will only be present in Derived Class otherwise you can create direct object of the Derived Class.