Christ University Bangalore Answered Questions

Christ University accepts lateral entry provided you have completed a diploma in the subject from a recognized college. The course will be for 3 years.
For more information kindly refer https://christuniversity.in/faculty-of-engineering/mechanical-and-automobile-engineering/bachelor-of-technology-btech-in-mechanical-engineering/641

Skill assessment test is part of the selection process for the course. The skill assessment will consist of a test on written skills, communication skills and logical reasoning. Apart from the skill assessment you will have a personal interview also.

I assume by management seat you mean general admission. If so, the eligibility criteria would be 50% in all semesters of your B.com. if you are eligible you can apply for the course online. You may refer this link for guidance as to how to apply.
https://christuniversity.in/commerce-and-management/commerce/master-of-commerce-(mcom)/860.
There would be a selection process that you need to clear after applying. The selection process consists of skill assessment (skill assessment will consist of a test on written skills, communication skills and logical reasoning.) and personal interview.