Java OCA OCP Practice Question 1070

Question

Which of the following statements is/are true?

Select 1 option

  • A. Subclasses must define all the abstract methods that the superclass defines.
  • B. A class implementing an interface must define all the methods of that interface.
  • C. A class cannot override the super class's constructor.
  • D. It is possible for two classes to be the superclass of each other.
  • E. An interface can implement multiple interfaces. 


Correct Option is  : C

Note

A. is wrong. Not if the subclass is also defined abstract!

B. is wrong. Not if the class is defined abstract.

C. is correct. Because constructors are not inherited.

D. and E. are wrong.

Interface cannot "implement" anything.

It can extend multiple interfaces.

The following is a valid declaration: 

interface I1 extends I2, I3, I4  {  }



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