About Question enthuware.ocpjp.v7.2.1120 :

[D3x!]

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

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List<? extends String>

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.

[admin]

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.

[D3x!]

great point thanks.

[lbunschoten]

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?

[admin]

You are right. This question was modified recently to use Shape instead of String and that introduced the error.
The line :

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list.add("extra");

should actually be

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list.add(new Shape());

Options 2 and 3 are correct based on that.

This should be fixed asap.

thank you for your feedback.