Which statement is true？（） A: Compilation fails because the hashCode method is not overridden. B: A HashSet could contain multiple Person objects with the same name. C: All Person objects will have the same hash code because the hashCode  method is not overridden. D: If a HashSet contains more than one Person object with name="Fred"， then removing another Person， also with name="Fred"， will remove them all.

Overriding a method differs from overloading a method because: ( ) A: Neither of the above. B: Both of the above. C: Overridden methods have the same signature. D: Overloaded methods have the same signature.

The following choices are the president's limits except for____________. A: Veto overridden by Congress with two-thirds consent of the Senators B: send and receive diplomatic and consular officials C: his policy can be vetoed and abolished by the Supreme Court D: all appropriations legislated by Congress

What is the effect of the following line of code super() A: The method that is overridden by the current method is called. B: The parent class’s constructor is called. C: The current class’s constructor is called. D: The child class’s constructor is called E: The current method is recursively called.