[Joeboy]

Interviewing sometimes involves using an unfamiliar platform, which involves things like not being sure which variant of mic icon means you're muted.

[eropple]

This happens a lot, and I'd recommend as a baseline having a microphone with a hard mute. My cheap Sennheiser USB headset has one; my XLR microphone is inline with a Rolls MS111 because it doesn't.

[joegahona]

For something high stakes like an interview, I'd encourage candidates to take the time to get familiar with the unfamiliar beforehand.

[mssundaram]

I agree, however not always possible

[BeFlatXIII]

Or a pair of icons: one of which mites your microphone and the other drops you out of the audio conference completely.