Hello Anjali,

IBPS RRB exam is conducted to recruit for PO or Cleck Level posts. Minimum education qualification needed is graduates who complete their Undergraduation course and should have their mark sheets on the day of registration. So, final year students in any undergraduation degree course like B.Sc are not eligible for IBPS RRB exam.
Age limit for various Officer scales for IBPS RRB exam are given below.
Officer Scale - I
Post- Assistant Manager
Age Limit: 18 years to 30 years

Officer Scale- II
Post- Manager
Age Limit: 21 years to 32 years

Officer Scale- III
Post: Senior Manager
Age Limit: 21 years to 40 years

Office Assistant
Post: Multipurpose
Age Limit: 18 years to 28 years
*There is relaxation in age for reserved category candidates as per rules.

This exam is conducted by the organisation Institute of Banking Personnel Selection. It is a written exam. You must have minimum 50% in graduation in any stream from a recognised University.
Click below link to get more details about eligibility criteria of IBPS RRB exam.
https://competition.careers360.com/articles/ibps-rrb-eligibility-criteria

Hope this helps.

Thank you!!