The J-1 Exchange Visitor Visa is for students, visiting scholars or lecturers pursuing an exchange program. For example, Fulbright scholars and many students on short-term study abroad programs from Indian universities will travel to the U.S. on a J-1 visa.
J1 visa is usually sought by working professional who goes to America on an exchange program, hence the name Exchange Visitor Visa. These may include a 10-month vocational training or some research fellowship, etc. Whichever be the case, the applicants would be notified for the same by the respective institutions.
Spouses or children accompanying J-1 Visa recipients will travel on a J-2 Visa. Please note that spouses are able to work when permission is obtained in advance.