First, there was a Phone-in with the FB recruiter. It was good and they scheduled an online coding one-to-one interview with Engineer. It was comparatively easy and in 2 days I got the message that the interview was successful and there will be a virtual onsite interview with the FB ML Team in london.
FB Recruiters are really helpful while preparing for the interviews. They are the best!
The Onsite interview had 5 rounds - Behavioural, 2 coding rounds, System Design, and ML Design. Coding rounds are average with problems similar to leetcode, and we need to prepare well in advance. System design and ML design are more focused on how we will approach the problem in real life scenario.