RRB Junior Engineer selection starts with CBT-1, a screening test for all applicants.
Candidates who qualify move to CBT-2, which is more technical and post-specific.
After CBT-2 come document verification and the medical examination.
There is negative marking in both CBT stages.
The final merit is based on CBT-2 marks with category-wise cut-offs — check the official RRB notification for the latest scheme.