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The terms a stakeholder will use without explaining, and how to ask for a definition without losing credibility.
3 questions in Working in a Domain.
Judge whether the term blocks the decision in front of you: if it does, ask immediately, and ask for a concrete instance rather than a definition; if it does not, note it and follow up afterwards. Then play back your understanding in your own words so the correction happens in the meeting rather than in the code.
Usually yes for the label and no for the concept. A fossil name is still the word that lets you and the business point at the same thing, so keep it as the shared term, but model what the queue is for today rather than the channel it was named after.
Evaluate architectural trade-offs in Speaking the Vocabulary between consistency, throughput, operational complexity, and data durability at scale. Use this domain knowledge answer to show the decision, trade-off, and evidence rather than a memorised definition. It also connects domain vocabulary to the point an interviewer is testing.