IIM

Hello Nupur Kumari,
The question is quite general. There are many different type of questions asked in an IIM interview. I would try to bucket and cover them all but it won't be exhaustive.
1) Academics :
You should be thorough with your undergrad education. Pick 3 to 5 courses and prepare them inside out. It's absolutely necessary for freshers and even for people with work-ex althought the chances are less. Academics depicts your interset in education and if you fail to answer the questions asked by the panel, it would bring negative points to you. Typical questions include
Favourite and least favourite subjects
Projects or paper related to your undergrad
Revise courses related to Maths
2) Work-Ex and internship:
This is the second most important topic and most important for high work-ex people. Know everything about your job. Learn and revise the theory related to your job even though you might not be using that in your job.
Know about your job, company, industry
3) HR
These are also one of the important set of questions. These might not be asked in the interviews directly. But these are necessary to build your confidence and justify to yourself about your situations and hence way forward.Questions include:
Why MBA?
Why now?
How does your career progression be affected by it?
Opportunity cost for the MBA.
Strengths and weakness
Hobbies and interests (very important)You are an Engineer?
You are wasting the knowledge?
4) Others
Random
Current affairs
Politics and socio-economic situations
Your state and your hometown (area, per capita, tourist spot etc.)
Economics (Budget)
Most of the sections you can prepare but you may have surprises on D-Day. Our aim should be minimize the surprises and prepare as much as we can.
All the best.