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typo error on Java OCP 8 Programmer II Study Guide Jeanne Boyarsky and Scott Selikoff

 
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at the page 53 section "Defining a Functional Interface"
in the frame with headline "Applying the @FunctionalInterface Annotation"

Conversely, if a class marked with the @FunctionalInterface
annotation contains more than one abstract method, or no abstract methods at all, then
the compiler will detect this error and not compile.

should be  if a interface marked with the @FunctionalInterface
 
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Agreed. @FunctinalInterface goes on an interface. Added to the errata. Thanks.
 
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