Hi - Re the explanation for why the fourth option does not compile:
"Since the variable names is of type List<String>, its addAll method can only accept objects whose declared type is a String. Declared type of oa[0] and oa[1] is Object and therefore it will not compile. The compiler doesn't know that these elements actually hold Strings"
I think this is a bit off in that the method need a List<String>, not just individual Strings, so even if the elements passed here were typed to String it still would not compile.
About Question enthuware.ocpjp.v8.3.1922 :
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Re: About Question enthuware.ocpjp.v8.3.1922 :
You are right. The explanation is off. Fixed.
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