JPMC have many rounds of interviews. Firstly there are 2 technical telephonic rounds.
After clearing both rounds, you will need to travel (If Out of City) to their office for face to face rounds. First of all they will again take the technical written test. After 2 hours of written test, there were first Project Lead round and Project Manager Round. Even after all these interview rounds, interview process does not end here. If you clear all these face to face and technical written test, then you need to face the onsite client round.
If you satisfy all of them, then only you will be given the offer letter.