I gave test of Assistant mechanical engineering in last week of august 2016, then I received letter in last week of october 2016 to submit attested copies of documents through courier, and also on fpsc site, a list of documents required students was, after that i have not received any response from 4 months approx.

How much time will it take for interview?
or
I could not make a spot for interview?

do they call all candidates who submit documents?