Fairly Easy and completely Resume based, They check your willingness to learn and grow. be confident and ready to work across various departments depending on your job title. Depending on your preparation and enthusiasm, you will be allocated a department accordingly. Also some strict norms and regulations that you have to follow on a regular basis.
I interviewed at Hindustan Aeronautics (Bengaluru)
Interview
They do not aleays take interviews for internships, because mostly interns are taken through referrals. But to get into HAL was a very great experience because you could learn and understand so much. People there are very sweet.
There is no specific interview to get an internship at HAL.
If you have someone who works there,then you can get a 4 weeks internship. He/She can refer you to the HR.