The RRB (Railway Recruitment Board) exam is a recruitment examination conducted by the Railway Recruitment Boards in India to select candidates for various positions in the Indian Railways. There are several RRB exams, each catering to different posts and qualifications. Some of the popular RRB exams include:

1. RRB NTPC (Non-Technical Popular Categories): For positions like Clerk, Goods Guard, Station Master, etc.
2. RRB Group D: For positions like Track Maintainer, Helper/Assistant, etc.
3. RRB ALP (Assistant Loco Pilot) and Technician: For positions related to locomotive operations and maintenance.
4. RRB JE (Junior Engineer): For technical positions in engineering departments.
5. RRB SSE (Senior Section Engineer): For senior engineering positions.

These exams typically include a combination of written tests, skill tests, and interviews, depending on the position. The syllabus generally covers subjects like General Awareness, Mathematics, General Intelligence and Reasoning, and General Science. The specific format and content of the exams can vary depending on the particular RRB exam and the position being applied for.