The Indian Oil Corporation Limited (IOCL) interview process for engineering graduates primarily hinges on your GATE score, which carries about 85% of the weightage. If shortlisted, the selection involves four main steps: Document Verification: Checking original credentials and NOCs. Group Discussion (GD) & Group Task (GT): Assessing communication and teamwork through current affairs discussions and team problem-solving exercises. Personal Interview (PI): A panel evaluates your core technical engineering knowledge, behavioral traits, and industry awareness. Medical Examination: A final, stringent health check before the official employment offer is made.