K-pack Systems interview questions

Got a call from company in morning around 8;30 am on 17-09-2017 for the interview on the same day at 11;30 am. Gave interview to 2 engineers who was working in proposal department,and got a task to identify potential consultants working in the same field. After reaching home, sent them a list and got confirmation of 2nd interview on 28-09-2019. Given my 2nd interview on 12-10-2017 with a panel of Director, Senior General Manager and 2 Proposal Engineers. They asked all the basic questions related to waste water treatment and discussed about salary part. And than, I joined from Dec-2018 and currently working.