Hey Ritik!

Counselling refers to any entrance exam counselling  where candidates are asked to select their preferences regarding colleges and documents verification is also done. Examples of some counselling are TS EAMCET Counselling, AP EAMCET Counselling, etc. Counselling may also refer to the process of advising or assisting people regarding anything.

Interview on the other hand, can be for job interview or internship related interview. It is usually the final selection process when it comes to hiring candidates. It is basically for screening the students for a position. The recruitment procedure includes interview. In the interview, they may inquire about your, your qualifications, work experience, work related knowledge and so on.