Comment by mcv

Of course a resume could be full of lies. That's why nobody hires blindly based on the resume but always has an actual interview. During the interview, talking about code, you'll notice soon enough whether the candidate knows what they're talking about. And that doesn't have to be (whiteboard) coding challenges or questions about obscure language details. Just talk about how they code, what coding style they prefer, how they organise their code, etc.