There was 3 rounds of interview.
1. Online aptitude test (60 Questions, 60 Marks, 60 Minutes)
Cut off for the aptitude test can be very high, be prepared. In aptitude test there was questions from general arithmetic, reasoning, C, embedded systems (as we opted for the embedded domain), general knowledge etc. Although it depends on the job role you are applying for.
2. 1:1 Technical Interview (My interview duration was about 15-20 minutes)
I was asked some practical questions about power supplies, control system, and ACs.
Also they asked, what I know about the company.
3. 10:1 (approx) Technical + HR round (Interview duration was about 8-10 minutes)
Again questions was on basic electronics engineering. They also asked why I want to join a core company rather than an IT firm and what I know about Johnson Controls.
That's it.
Results was declared after 15 minutes or so.