mock question:
Which statement is true about the primary key of a
Java Persistence entity?
A. The primary key cannot be overridden by a mapping descriptor.
B. The location of the primary key defines in the topmost entity class in the hierarchy.
C. If property-based access is used, the properties or the primary key class must be public or protected.
D. At least part of a primary key must be defined in the class that is the topmost class of an entity which is defined by a hierarchy of classes.
Given answer is C,primary key could be put in mapped superclass too,so B is wrong,D apparently wrong.
why A is wrong?
can anyone explain C(why property-based,why public or protected,and how about field-based access?)
