First, framing: obviously, every company would love to hire candidates who are proven experts in their methodology and their technology and their industry. But

First, framing: obviously, every company would love to hire candidates who are proven experts in their methodology and their technology and their industry. But it's just as obvious that this isn't possible. So hiring involves compromise. You don't need to get every question "right" in order to be a winning candidate. Second, as itamarst said: always be honest, but also be curious. If you're consistently seeing something come up in ads or interviews for the places you want to work, dedicate the time to research it thoroughly and earnestly. You can't invent experience, but you can demonstrate enthusiasm and preparedness. Third, fulfill the compromise: look for jobs where you're already a very good fit for other details like familiarity with their industry or with a particular solution. The more you stand out by some measures, the more leeway they'll afford you for others.