Referrals are surely the best way to get the process started quickly. Apart from that you can also get the HR's contact details to reach out or for follow-ups. Also, most companies have a portal on which your friend can let you know the profile status.

Hi definitely whenever your interview is schedule for specific company first thing to do research about that company business.

• Than go to websites like Glasdoor, Ambition Box and go to Interview section page filter out the role you have interview for and go through all comments because generally people mention what types of question had been asked.
• Than go to leetcode websites go to discussion section there also you will find lots of interview experiences and question had been asked for that profile in that company.
• Than you can reach out to people who are working for the same profile you had applied and ask there help to understand the interview process and how to prepare well.

No one will tell exact questions but if you got some idea about or get bigger picture of interview process and crucial topics to prepared I am sure you will be able to crack interview.

For more knowledge on how to prepare or crack interview . Schedule a session with me