hi,

see ssc je and rrb junior engineers exam is mostly recruit for diploma level engineers recruitment, syllabus is fully diploma engineering standard, has less number of numerical and most of the questions comes from theoretical concepts. however to achieve a good score you must study hard and must follow the previous years question paper to know about the difficulty level of exam.

however b.tech degree holders are also eligible to participate in ssc je and rrb je, but if you go though the past years recruitment maximum post is for diploma holders, also compare to other engineering stream like mechanical, electrical, civil engineering vacancy is large. however you must follow standard books for preparation of any competitive exam.

hope it would help.