The document provides information on cut-off marks and selection process for IBPS RRB Officer recruitment exams in 2018. It discusses three factors that influence cut-offs, including question difficulty and number of vacancies. Cut-offs are provided for preliminary and main exams for Officer Scale I-III positions. Candidates who meet sectional and overall cut-offs will be shortlisted for interviews, followed by provisional allotment to RRBs based on merit and preference.