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Sybex Practice Tests 11 --- page 510 --- anwser #13

 
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Should be "Now , we have to decide if Y or Z are the service provider" not service provider interface.
 
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Confirmed and added to errata. I also confirmed this is wrong in the Java 17 version. And it's not too late to fix. So have a cow for getting this fixed in the Java 17 version!
 
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