Þ D. THE ONLY TIME A LISTENER IS REQUIRED IS IF THE DBCA IS USED,...

13. þ D. The only time a listener is required is if the DBCA is used, and Database

Control is selected. The DBCA will not continue if it cannot detect a listener.

ý A, B, and C. A is wrong because there is a circumstance where a listener

is required; B is wrong because in all other circumstances a listener is not

required. C is wrong because it does not go far enough: The DBCA will not

require a listener, if Database Control is not selected.