One of my friends graduated from ISI, Delhi Campus. So I might be able to give you some information about it.

• For the Kolkata and Delhi campuses, I don’t believe there are separate MSQE exams. 
• When filling out the application, you must choose between Kolkata and Delhi.
• If nothing has changed since 2009, which I assume it has, you will only have to take one exam and select your campus on the application form.

However, in Delhi and Kolkata, interviews are performed at the relevant locations. That is, students who are chosen in a Delhi interview are admitted to ISI Delhi, and vice versa.

ISI Kolkata is considered to be a good institute for B.Stats. It accepts admission purely on the basis of the entrance exam and the interview. The minimum eligibility criteria for the entrance is 70% in class 12th boards. 

The selection process will be finalized upon your performance in the entrance exam and the interview session. With this score, you will be able to pass through the cutoff but you must have an exemplary performance during the interview session.

All the courses of ISI Kolkata i.e. M. Math, M. Tech (CSE), M. Stat, MSQE, and M. Tech QROR have the same placement rate that is 100%. All the courses have a placement rate of 100% and every student of ISI Kolkata either gets placed. 

The only thing that differs in all these courses in terms of placement is the time when they get placement. The students from one course get placed earlier than the other. M.Stat students get placed earlier than the MSQE or M.Tech students. According to the average package, the students of M.Stat usually receive a higher average package. However, MSQE or M.Tech students also get higher packages in some years. The average CTC offered at the institute is 19 LPA. 

Some of my friends took admission to ISI Kolkata for their bachelor's courses. Here are a few of their tips which you can follow while you prepare yourself at home.

• Lay emphasis on Mathematics concepts like Number Theory, Combinatorics, etc. from a standard book, like Excursion.
• Try to Solve a set of problems daily from the Test of maths at 10+2 level.
• Solve a lot of MCQs from JEE books which are easily available both offline and online.
• Learn calculus at an advanced level from the book - I.A. Maron, etc.
• Revise and fine-tune whatever you have learned till now. Take routine tests to keep a check on your preparation.

Overall, home preparation is quite simple if you want to score well enough for ISI Kolkata. Follow the important points and practice each and everything as much as you can. Also, you can always take help from your seniors who have gone through similar exams.

According to some of my friends from ISI Kolkata said it does offer undergraduate courses B.Stat or B.Math. Let me tell you some courses in detail for better insight.

Indian Statistical Institute offers the following two bachelor programs:

3-year B Stat (Honors):

• The criterion for this is you require successful completion of Higher Secondary (10+2) or equivalent with Mathematics and English as subjects.
• You will get a Stipend Rs.3000/- per month (Offered at Kolkata).

3-year B Math (Honors):

• The criterion for this is you require successful completion of Higher Secondary (10+2) or equivalent with Mathematics and English as subjects.
• Stipend Rs.3000/- per month (Offered at Bangalore).

Therefore, according to my friends, apart from these two undergraduate courses, ISI does not offer any other Bachelor Programs.

Both the above-mentioned options are excellent to be considered. The IIMs prepares you to manage people and processes, whereas the ISI prepares you to be excellent quants.

Many IIM graduates work as quantitative analysts, they get the highest-paying jobs. If the ISI course is more appropriate, you could take the Bachelor of Statistics course. Quantitative analysts, on the other hand, tend to wear out soon, due to heavy workload.

An IIM education provides you with a broad perspective on management as well as access to a large alumni network. So, if you want to work your way up the corporate ladder, an IIM would be a better option. At the end of the day, it's up to you to decide where your priorities lie.

If you are going for a Master’s degree just for the sake of getting good pay, then don't, it'll be a waste of your 2 precious years. Let me give you an overview: 

• M.Tech will not fetch you a 6-digit salary in an instant unless you are placed in a top company like Google. 
• If you're interested in going for M.Tech in CS then plan ahead- see what is asked in the ISI exam. You will find that it's mostly the B.Sc level Math.

If you are in Kolkata, then definitely go to ISI. There's a bookstore behind the college, it has a Math book especially for the ISI entrance test. You may buy and prep from that. 

According to the qualification needed for M.Tech a student needs to qualify the GATE exam. A senior of mine was the first one in my knowledge to join M.Tech CS. She ranked within the top 300 in GATE electrical engineering. 

Gradually mechanical and other core branches are also allowed to apply for M.Tech in CS. It is also mentioned in the GATE brochure of ISI Kolkata that graduates from other branches can apply to M.Tech in CS

Gradually a lot of my seniors applied for M.Tech in CS after completing their graduation. A survey says that major of the applicants for M.Tech in CS are from other branches like mechanical and core branches also.