It is okay to expound on the topic in more detail when answering qualitative questions. Keep in mind that the interviewer is also evaluating your communication style. This is important for any job since you are expected to collaborate with other members of the organization who may not have the technical expertise you do. Being able to describe complex technical topics in a simple, easy to understand language is an important skill Java programmers who use Enum must possess.

"When using Enum ordinal in Java, it will return the ordinal of the Enum constant, in its original position defined in the Enum declaration. This assumes the initial constant is assigned an ordinal of zero. This is a rarely used method. It is typically used by complex Enum-based data structures, including EnumMap, EnumSet, and compareTo methods."