Enthuware

This question doesn't quite make sense to me.

Consider the options written out.

1 must be valid.

2 is a method, not a constructor.

3 would be written like Which is wrong. At first glance you might think it's for an interface, but interfaces don't have constructors.

4 must be correct.

5 would be written like which is wrong since it has a ; at the end.

I can only see 2 valid constructors in this question.

Could someone enlighten me to the 3rd correct option?

Thanks!

Did you read the explanation written below the 5th option?

The compiler ignores the extra semi-colon.

HTH,
Paul.

The explanation for //3 is that the constructor has empty body.
But all other have empty body (only have brackets)??

It also explains further what it means by empty (it cannot be abstract). I have updated the explanation to make it more clear.

thank you for your feedback!