I bet most people get the "protected" one wrong, because it's actually strictly less restrictive than package access in Java. That is, protected members can be accessed by anyone within your same package. Do you reject people for not knowing that any class in the same package can access protected members? If so, you probably just weeded out a huge percentage of Java programmers.
Altough I like that answer you gave and this sort of "detailed" questions (I don't think the article had that in mind tough), primarily because if you can answer it I would guess that you know Java enough to be usefull without needing any furhter questions. Someone reading trough a textbook might read that but won't remember it unless he knows the implications, and if he knows that he knows Java. And if you don't know it that cool too, there are other questions like this that demonstrate actual expirience with the language/tools vs. shallow textbook trivia.