Which feature in Java executes a one-time task?

In the context of developing intradepartmental cooperation for computer-related crime, duplication of effort dramatically ________ the efficacy of dedicated efforts

Fill in the blank(s) with the appropriate word(s).

When different operations must occur based upon the value in a single field, it is best to use a(n) ____________________ statement to test the value.

Fill in the blank(s) with the appropriate word(s).