Tech Mahindra Aassociate Software Engineer interview questions

Forst round was aptitude and next was technical plus HR combined(f2f).aptitide was easy to clear and technical round plus hr had a mixed type of questions.F2f round ,they tested my personality and knowledge as well.while i was able to answer few technical and others i was unaware yet they wanted my personality to be good to learn and adapt to the atmosphere. I got an offer yet I haven't joined even after one year as they didn't provide the joining date or start any process.