United Mechanical interview questions

Applied through job posting on Linkedin, Turned out there were were multiple Job posting through multiple different recuiting companies for the same positoin. then was contacted by a couple of recuiters. One recruiter was rude so the conversation did not continue. A second recuiter first reached out through an assistant, gathered some of my basic information. then a phone call with the recuiter, more basic information. then arranged an onsite interview. then a second onsite interview.