IIT JAM Exam is one of the best exam for M.Sc. On the basis of its score IITs provide admissions for post graduate courses.
After doing M.Sc. candidates can get a bright future in government field, private sectors, technical jobs etc. After M.Sc. candidates can pursue higher studies.
Some career scopes are provided here after doing M.Sc. through IIT JAM Exam – https://scoop.eduncle.com/iit-jam-career-scope-after-msc-phd