Final answer:
An armed salute with a rifle is not rendered while indoors, contrary to practices during funerals, ceremonial parades, and official greetings which traditionally include such salutes.
Step-by-step explanation:
When armed with a rifle, a salute can be rendered on all occasions except while indoors. The scenarios presented, such as at funerals, ceremonial parades, and during official greetings, are all occasions where armed salutes are traditionally rendered in military practice. However, rendering a salute with a rifle while indoors is not part of proper military etiquette.