Final answer:
The overflow menu is displayed on the right side of the action bar when a device does not have a physical Menu button, providing additional options in an Android application.
Step-by-step explanation:
If a device doesn't have a physical Menu button, an overflow menu is displayed on the right side of the action bar to display the options menu. This overflow menu contains icons or menu items that do not fit on the action bar due to space constraints or that are less frequently used.
The overflow menu is an important user interface element in Android application development and is used to offer additional options to the user without cluttering the main view.
The overflow icon will automatically appear in the app's action bar or toolbar if there are more items than can fit in the available space.
This pattern allows users to access additional features or settings conveniently without cluttering the main interface. It's essential for providing a clean and intuitive user experience in mobile applications.