I usually look for some obscure buzzword which I know something about and ask the candidate about it. For example, if he has Foo on his resume I will ask a conc

I usually look for some obscure buzzword which I know something about and ask the candidate about it. For example, if he has Foo on his resume I will ask a concrete technical question related to Foo. Oftentimes it turns out the only experience with it he or she has was in a college, years ago. For me, that is an indication that candidate tends to exaggerate his knowledge and whatever else he lists on his resume has to be taken with a grain of salt.