AP Computer Science Amediummcq1 pt
If class B extends A, the statement B x = new A() is
A.a compile error without a cast
B.legal
C.a runtime error always
D.legal with any object
Explanation
Core Concept
A superclass object is not a subclass.
Correct Answer
Aa compile error without a cast
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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