I went through 6 rounds of interviews and didn't hear back until 1 month later that I was rejected. The recruiters don't do a good job at communicating to you throughout the entire process.
I applied online. I interviewed at Course Hero (New Delhi) in Feb 2020
Interview
There was a subject test in Biology that I applied for, which was part of the application process. It aimed to assess my knowledge and understanding of core biological concepts.
There is no interview per se. However they look at your transcript of records and they use that to determine which categories you can teach. So if you took a history elective you are more likely to be assigned history questions (if you apply for that). And I suspect grades play a role on whether you're accepted in general.