Does genuine communication take place between strangers in a contrived, artificial context?

Does genuine communication take place between strangers in a contrived, artificial context?

Is the language repertoire of a person truly elicited?

Is ‘interview language’ representative of a person’s everyday language?

Can we generalize from oral communicative tests based on a single type of test, given on a single
occasion, based on a test interview which is not a typical daily event?

To what extent are language abilities comprehensively sampled in an
interview?