If after B Tech my placement is done in some nice company with an amazing package but I want to do M.Tech also so what to do then?

If you want to go for the Higher studies then you can go do it in two days. In some companies, there are study leaves for the students who want to go for the higher studies, through this you can get stipend from the company and after passing the course you can work full time in the company. Also, some companies have tie up with companies in order to provide a better skillset to there employees. So the company, you have got placed in, allows such things or not, you have to enquire. If your company allows this, then you can do the job along with your studies.

Now if you are interested to go for the MTech course in top universities, and you want to do MTech only with your full rigor, then prepare well for the GATE examination and try to get into IIT's for the MTech course. This will increase your demand afterwards both in research as well as in job sector.

This can be the two most probable ways for you to go , now its you who have to decide based on your dreams, aspiration and plans.

For more information regarding MTech consider the link below:

https://www.careers360.com/courses/m-tech-master-of-technology

For more information regarding GATE consider the link below:

https://engineering.careers360.com/exams/gate

I hope this helps. Wish you a great eve!