Exam

Hello, Shivani! One should score at least 50% in graduation for securing admission into the various MBA colleges. And except XAT and MAT, all the other entrance exams require one to obtain that score, to be eligible to appear for the particular exam.

Yes, you are eligible to apply for SSC junior engineer after B.Tech ECE. Even the Diploma students are eligible for the same.

The syllabus of entrance exam conducted by Agriculture University is class 11th and 12th courses of NCERT for PCBM. And, you have to prepare a bit of Agriculture part from outside or from other books, as NCERT is not enough for that.

For MBA, it is mandatory to write any of these entrance exam - CAT, CMAT, MAT, XAT, SNAP etc.
It depends on institute as to which exam they prefer and what is the cut-off score.

No, it won't be valid for 2019.
2017 CAT Percentile will be valid for 2018 admissions only.

Refer the official website of Joint Entrance Examination:
https://googleweblight.com/i?u=https://jeemain.nic.in/&grqid=LWc5S_Dn&hl=en-IN