Selection Process of Railway Exams?

I graduated as BE(Mech) on Oct 2011. I wanted to know whether interview is conducted in railway exams like BMRCL, DMRC or candidates are selected by just marks on the written test
Also what is the salary offered?

Thank You

Related Questions:

• Basic requirements regarding Railways? Exam pattern, selection process and important information regarding Railways?
• What are the Job Opportunities available for B.A Students ?
• What is better after 12th to get government job?
• Can i get job after completing intermediate? Maximum salary will i get in this? Courses with small investment to get a good job?
• What should i do to get government job being a graduated?
• Selection process to get select in Group I exams conducted by TNPSC?
• Railway jobs for diploma in Mechanical engineers
• Process of joining Railway Ticket checker job
• How to get job in Railways after completing diploma in E&TC?
• Job in Railways after B.Tech in Electronics?