Indian Railways is ranked #1 among countries with over 5 billion passenger kilometres. Indian Railways, which has 114,500 total kilometres of track and 7,500 stations, has the fourth-largest railway network after those of the United States, Russia, and China. To select candidates for the coveted Indian Railway Division, the Railway Recruiting Control Board conducts interviews.
In order to choose candidates for various positions in railroad units, Railway Recruitment Boards (RRBs) conduct a variety of RRB tests, including RRB NTPC, RRB Group D, RRB
JE, and RRB ALP. Numerous applicants submit applications for these Railway tests.

Read more: https://www.cheggindia.com/govt-exam-type/railways/