What to do after B.Tech?

Shubham,
You have a wide range of options to choose from on completion of B.Tech. Choose as per your preference from the following options:

1. You can pursue M.Tech to gain specialized knowledge. To join a college for M.Tech, you will have to appear for GATE examination and then choose a college as per you percentile.
2. You can pursue MBA if you have any inclination towards management jobs. This is a high yielding career choice if pursued from a reputed college. To enroll yourself for MBA, you will have to appear for CAT/MAT/XAT.
3. If full time courses are not your cup of tea, you can go for short term diploma courses such as protocol testing, machine designing, embedded technology, VLSI, etc.
4. You can appear for IES examination to grab a job as a Civil Servant.

Choose wisely and then work hard to achieve your goals. Good luck !