Probably a language needs to be l33t enough to have standardised interview questions, which are mostly the very hyped kind.
To be honest, I was never asked such language detail questions in a job interview, it was always more about familiarity with frameworks or kinds of apps.
Moreover, there was always some interview with a senior programmer, and they wouldn't have asked stock questions to begin with. (I was lucky, he asked if I knew Indy, and I showed him I ported Indy9 to FPC:-)
Same when I later sat in on a few job interviews as senior programmer myself.