IIM Indore - Indian Institute of Management

NO, recruitment is a centralised process and one has to clear CAT to seek admission.However there is a quota system ,wherein seats are kept reserved for SC/ST/army/agriculture graduates/etc and students from the said area are given admission based on their rank in CAT under the specific quota system

IIM Indore is Autonomous institute.
https://www.shiksha.com/getListingDetail/29623/institute/college-Indian-Institute-Of-Management-Indore-Iim-Indore-Indore-India

Start preparing for CAT in your degree years. Now just stay focused on 12th. Best of luck !

They are in fact more important than CAT marks. IIM. Indore gives 35% weightage to 10th and 12th marks each, and less than 30 to CAT.

Please see the website of the institute

Dear Sumit,
Basically prepare yourself in such a way that the interviewer should feel you feel you are worth deserving the course.
Prepare yourself on current events, subjects you like most, hobbies and most important you need to be confident in presenting the same.
I have shared few links for your help,
Regards,
Arun Dev

you should write CAT first

Just inform the admission office of the institute and they will take care of the same.

Post graduation diploma in management

Yes, but your final selection depends on how much weightage given to your undergrad component. If it is quite high, it would be difficult to get into IIM.