I applied online. The process took 3 weeks.

I interviewed for a PhD SWE, ML for NLP domain position. I completed round 1 of the interviews, which consisted of an ML domain round and a behavioral round. In the ML domain round, I was asked to design a SPAM classifier and then write a pseudocode for a Bi-gram model. In the behavioral round, I was asked both hypothetical and common behavioral questions. My recruiter told me I would be asked about my projects for the domain round, but it was a design question and I fumbled.

Design a spam classifier and write pseudo code for a bi-gram model.