I Agree with EL CHILI ,
They have had some resignation in management and now their new guys are a bit behind . The clearance can take anything from 1 month after screening to 5 months.
Screening is pretty standard with sim check , few tech questions and few personnal questions , past history , experience on type , and questions like " why do you want to work for Jet Airways ? " , etc ...
That's for Captain , I am pretty sure it will be the same for F/Os.
Good luck