Hi Chandni,

I am attaching here, the link to a website that will help you understand the syllabus and exam pattern for the ASM Railway exams. The website will also provide you with the links to the pdf files for RRB ASM Recruitment, ASM Syllabus and RRB ASM Previous Year Papers. 

Link -

http://www.recruitment.guru/rrb-asm-syllabus/ 

If the link does not work by clicking it, then copy and paste the same. 

I hope this clarifies all your doubts. Pleaae contact me for any further help.