How do I prepare for Data Analytics Placements at IITs (specifically, IIT Kharagpur)?

One of my friends is working in the Analytics Industry for the pasts 4 years and has given enough placement interviews in the same sectors to have a great experience. I asked him about the preparation for the Data Analytics interview. He told me that their placements are quite similar to other companies and comprise: 1 aptitude test and 3 interviews; out of these 2 are technical and one HR

Aptitude test: This written test is very similar to a CAT exam and other exams of easy to medium level of difficulty. Anyone who is preparing for CAT or GMAT would easily clear this test with an additional focus on any aptitude book.

Technical Interview: These interviews come under 3 headings

• Resumes projects
• Guesstimates
• Case Interview

Resume projects: Preparing for this interview is easy and requires a good resume that can be built in multiple ways. You can take up data projects with R and Python which will make your resume appear better. You will have a considerable advantage over those who lack such projects. 

For guesstimates and case interviews: These interviews require preparation that is similar to other interviews.

Based on the approach companies take while selecting candidates, you can prepare accordingly and ace all the interviews.