Hello Shalini Shaw

For getting a job in any PSU, it is mandatory that you have 60% in your undergraduate course only. Many PSUs don't consider the 10th and 12th board percentage, but some set a minimum limit like 60-65%. ONGC doesn't consider the board percentage.

Candidates will be shortlisted on the basis of their GATE 2018 scores. Those candidates will be called for a personal interview. They must carry their original documents while attending the interview.  After they qualify in the personal interview, candidates will have to meet the requisite medical parameters which are laid down by ONGC. After that a merit list is prepared based on some other parameters.

For more details, kindly visit the mentioned page

https://engineering.careers360.com/articles/ongc-recruitment-through-gate

Hope it helps you.