Some of my friends studied at NITIE Mumbai. They now know all the intricate details on how to face a GD and a PI round. Let me share some things they used to keep in mind. 

Tips for GD:

• Try to start the discussion. Give it a structure and then conclude it. 
• Remember that if you give it a structure, it should flow in the same direction. Though it can be a bit tricky.
• If you are not able to start the discussion, make sure that you give at least three distinct and strong points.
• When you state your point, try backing it up with facts and numbers. This will make you stand out among others.
• Stay updated with current affairs and trends.

Tips for PI:

• Read your CV thoroughly.
• Questions that you can expect from your CV are related to your work experience and your projects if any. 
• If you are a fresher, you can expect questions on your final year project, your favorite subject, etc.
• Since my friend was a mechanical engineer, he was asked questions on thermodynamics and a few on the composition of air.
• You can expect basic questions such as Why NITIE Mumbai or Why Supply Chain? Go through the basics of supply chain and operations management.

So, these are some of the things you need to be prepared for. Overall be honest, humble, and answer with confidence.

You should prepare yourself from the beginning when it comes to giving entrance exams. You should believe in yourself and know that things might change. You shouldn’t stress yourself out too much and just focus on what is in front of you.

Here are a few methods that might help:

• You should use the NCERT books and grasp as much as you can. Learn, remember and understand whatever information you can from these books. They cover all three topics of Physics, Chemistry, and Mathematics.
• When it comes to Physics, the NCERT books will definitely help you. If you study them properly and get a good grasp on the concepts and have your basics cleared with the formulas learned, you will do well.
• For mathematics, you can solve all the NCERT books including the exercises and examples with all other miscellaneous exercise questions.

Overall, make sure your concepts are clear. Follow the NCERT book to the core and study well. You may have prepared for JEE Mains which will also be a good booster. You should also practice last year’s JCECE question papers as this will give you an overall idea of the exam.

If you're talking about IPM at IIM Indore, I would say being a student here, that IIM Indore generally looks for students who can stand out among others.

In terms of WAT, reading articles helps a lot. You come across numerous themes, which helps you gain knowledge and build a good vocabulary.

For PI, study current events and trends and be prepared for odd questions. They will not only test your knowledge but also your IQ. As a result, the key to acing your interview is to respond with honesty and confidence.

I hope this piece of information is useful for you all and gives you a basic idea about how to start your preparation for WAT and PI.

If you are preparing at home then subscribe to any youtube channel that covers all the sections and topics. ADDA24/7 is a good channel covering all the relevant topics that appear in Bank exam and DSSSB.

Follow a specific preparation plan then study the exam pattern and figure out which sections in quantitative subjects have the most weightage. For instance, for the SSC exam or any bank exam, some questions from certain sections are fixed.

If you focus on these topics, you can easily solve a majority of the questions in this section: 

Simplification: 

• Focus on this topic because about 20 percent of the quantitative section is made up of this topic. 
• Use quick mental maths to solve these questions and try to focus on the concepts as well. You can use short tricks to make quick calculations and save time. 
• Practice questions from topics like BODMAS rules, Approximation, Square and Cubes, Surds and Indices, Decimals and Percentages.

Number Series:

• This is the easiest topic in the quantitative section. 
• Try to solve over 300 questions from different platforms and once you get a hang of the topic, you will be able to confidently answer all the questions. 
• During the exam, if you don’t understand the pattern within 30 seconds then move on. Don’t waste your time and practice more.

Data Interpretation: 

• This topic requires practice every day. Practice all the different types of questions related to Pie Charts, Tables, Line Graph, Bar Graph and Miscellaneous questions with word problems. 
• Data Interpretation questions are common in exams, you will get at least 1 or 2 sets wherein some questions are easy to solve and require fewer maths calculations.

Quadratic Equations:

• The questions from this topic are fairly easy and if you know the basic concept, then you can easily attempt all the questions. 
• Practice 100 questions from this topic daily. 

All these topics are very important, so prepare them well. Focus on solving questions on a daily basis and try to stay up to date.

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.