First round was telephonic , just the basic details pertaining to the resume and how your profile fits for the role according to the projects/poc s you have done. Second round was technical. Basic Sql, Python,ML questions along with a case study. Third round was supposed to be business case studies related as was informed by the HR but i suppose the interviewer was not aware of the concept of case studies so he started asking basic ML questions like bias variance trade off, multicollinearity. It seemed as if some url was opened and he was reading the content line by line. It seemed like he was not ready to accept any answer whose phrasing is different than that was mentioned on the url he opened for reference.

Resume Shortlist: This is the initial stage where recruiters screen resumes based on the job requirements and select candidates who appear to be a good fit for the role. Technical L1, Technical L2, Technical L3: These are technical interviews conducted by engineers on the team. The difficulty and depth of these interviews typically increase with the level (L1 being the most basic and L3 being the most advanced). The purpose of these interviews is to assess the candidate's technical skills and knowledge relevant to the position. HR Round: This is an interview conducted by the Human Resources (HR) department. It typically focuses on the candidate's soft skills, salary expectations, and overall fit with the company culture.