AP Computer Science Aeasymcq1 pt
If class B extends A, the statement A x = new B() is
A.legal
B.a compile error
C.a runtime error
D.only legal with a cast
Explanation
Core Concept
A subclass object fits a superclass reference.
Correct Answer
Alegal
More Unit 9: Inheritance practice questions
- mediumA superclass reference to a subclass object can call
- mediumAn overridden method may call the parent version with
- mediumWhich class is a subclass of Object?
- mediumWhich method is present in the Object class?
- hardWhich describes dynamic dispatch?
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