VARIOUS ENTRANCE EXAM APPEAR AFTER B.TECH

There are various entrance exams that you can appear after B.Tech . It depend on your choice of career.

If you want to do postgraduate in sciences you can choose MS or Mtech
IIT - Joint Admission Test for M.Sc (JAM)
Graduate Aptitude Test in Engineering (GATE)
IIIT PG Entrance

If you want to pursue MS abroad you can sit for
GRE
TOEFL.


If you want to do management courses then you can appear for exams like
CAT
MAT
XAT
IBSAT
TANCET
SNAP
NMAT etc

If you want to get into a public sector job you have to sit for exams like
Gail
SAIL
BHEL
IOCL
NTPC
ONGC
ISRO

For government sector/private sector there are exams like
Banking entrance
Railways
Defence services
IAS
IES
DRDO etc.
IPS

you can choose your own career and start preparing.
Good Luck