Question 1 What restriction is there on using the super reference in a constructor? It must be used in the last statement of the constructor It can only be used in the parent's constructor It must be used in the first statement of the constructor Only one child class can use it Question 2 N What is an abstract class in Java An abstract class is class which cannot be instantiated An abstract class is any parent class with more than one child class It is another name for a base class An abstract class is one without any child classes