Biotronics3D interview questions

The interview lasted 3 hours and involved a series of coding challenges followed by a review. Prior to the interview I was required to sign quite a demanding NDA. The interviewer was easy to get on with however the coding tasks required programming knowledge that was not stated on my CV and was not made clear before the interview. It felt like it was all to tick a company checkbox. After investing 3 hours of my time and a weekend setting up the required software and preparing for the interview, I was met with no feedback or response of any kind by the company.