Enthuware

just curious, as String cannot be extended surely it can only be of type String and nothing else?

list is a List of some class that extends from String. It may not necessarily be String. Therefore, you cannot add a String to list.

What you say is correct but it does not apply to declarations that use generics. Ideally, compiler should not even allow List<? extends String> because String is final. But I guess it might lead to complications if, for example, a class is later on made non-final (or final) and that is why it does not check whether the class is final or not.

HTH,
Paul.

great point thanks.

Very hard to answer this question correctly as none of the answers compile. A String can't be added to a list which requires a Shape. Also the methods have a parameter 'strList'. You would expect a list of Strings. However in all examples it is a list of Shapes. Even if you would replace Shape with String for each individual parameter, it would still leave you with four incorrect options.

So I assume there is something wrong with this question or am I doing something wrong?

You are right. This question was modified recently to use Shape instead of String and that introduced the error.
The line : should actually be
Options 2 and 3 are correct based on that.

This should be fixed asap.

thank you for your feedback.