Glassdoor users rated their interview experience at Coal & Oil Co. as 100% positive with a difficulty rating score of 3 out of 5 (where 5 is the highest level of difficulty). Candidates interviewing for Chemist and rated their interviews as the hardest, whereas interviews for Chemist and roles were rated as the easiest.
I applied in-person. I interviewed at Coal & Oil Co. (Chennai) in Aug 2012
Interview
Three rounds of interview, 1st technical round technical question, previous work skills, present company knowledge , 2nd Manger level skills and technical questions and 3rd HR round about previous work experience salary and behaviour, communication and flexibility.