there are 4 round interview, 1. phone call from HR. 2. on-site introduction and writing test conduct by candidate group. it's not hard, just basic math, sense of space, and traffic rules. 3. on-site one-on-one interview. 4. driving test . usually they will arrange 3 and 4 in same day, so you don't need to ask for another leave to attend interview.

Quick interview, about 25 minutes or so. Chill interview with 2 people. One was writing, one was typing answers. Nice people. Questions mostly about driving and experiences being on a bus and situations that may arise. Mostly common sense.