Broadcast receivers are Android's implementation of a system-wide publish/subscribe mechanism, or more precisely, what design pattern?
A)observer
B)facade
C)mediator
D)command

Question

Quizplus · Accepted Answer

Broadcast receivers in Android implement the observer design pattern, where they listen for and react to broadcast messages from other parts of the system or applications.

Broadcast Receivers Are Android's Implementation of a System-Wide Publish/subscribe Mechanism