5-6 rounds based on the position. each interview will be 30-40 mins minimum. for the whole process it will take 2-3 months, but you never know whether r you will get selected or not. even though u reach final round u may not got job.
Collins Aerospace visited my college for campus placement.
The interview process started with aptitude test . There was a quick talk about what the company is and what is does and other details. After the aptitude test some student were shortlisted for the GD round. I got selected after the GD. There were 7 selected from my branch.
The technical interview was nice and the representatives of the company were actually very warm and understanding.
Then i got selected for the HR round . This round had all the basic questions like any other HR round.
I applied through college or university. I interviewed at Collins Aerospace
Interview
First, they will be taking the aptitude test with basic mathematical and reasoning questions and after that will be checking your technical hold on different languages and about the aviation terminologies and at the end there will be one HR round.