GD

For admission to the MBA programme, a valid score in CAT/ MAT/ XAT/ ATMA is essential. If you are taking Admission in BBA B.Com B.Sc. B.A. B. Des, and Bachelor of Interior Design is based on the interview conducted by the Institute.

https://www.shiksha.com/college/psg-college-of-technology-psgct-coimbatore-19398
You will find all the true and authentic information about your college here

No, you do not need to appear for an entrance exam in order to pursue B.Com from SJCC, Bangalore. Admission is based on marks obtained in 10+2. Joseph's College of Commerce for B.Com. The admission is purely based on the marks obtained in 10+2.
St Joseph college fix number of seats as per the various board examinations i.e CBSC, ICSE, and various other state boards. So the Cutoff will depend on the board you are studying in class 12th
CBSE - 95% - 96%
ICSE - 91% - 92%
Andhra Board - 96% - 97%
Karnataka PU - 94%
And you are asking for the Karnataka board so it's 94% and it's conduct classes in two shifts like morning and evening.

You can check their website out: https://ibsindia.org/dehradun/ regarding the present eligibility criteria. Regarding preparation just go and give your best confidently. Read newspaper , stay up to date , have some general knowledge and attend and follow the GD-PI preparation sessions they will give before your selection process.

Hello,
Hearty congratulations that you have shortlisted for GDPI at TSM, Madurai. There is no specific topic that will be asked in GDPI. Just be prepared with the latest business news and International affairs. Followed by WAT & PI.
All the Best,
Already Admissions'20 has been started. Do Apply and get into TSM before the seats get filled up.
Feel free to approach me for more information.
Abdullah Salman M
Campus Brand Ambassador - MBA/PGDM
PGDM - MBA Admissions Process Eligibility Criteria - Admission Process, How to Apply, Important Dates

There is only an entrance exam, no GD/PI is there.

The GD would usually carry general topics such as current affairs and GK, but with slight inclination towards tourism. The PI would vary from individual to individual.

You can compare the colleges with this college comparison tool https://www.shiksha.com/resources/college-comparison

Questions in PI could be personalized (about family, about where you come from), general knowledge, recent issues and a couple of technical questions from your educational background etc. GD topics can be general - previous year topics included topics like
- Declining child sex ratio - who are the culprits?
- Demonetization
- Love marriage vs arranged marriage
etc.