Undertaking regarding NOC at the time of Interview possibilities

I Am working as Junior Assistant Finance in (CPSU).I had applied Assistant Registrar MNIT Jaipur. Assistant registrar eligibility requirement is Post Graduate, experience is not mandatory.my application is not sent through proper channel and also not mentioned current experience because my experience is not related to present job.Just now list of eligible candidates for the post of Assistant registrar hosted on website .Written examination and interview will be held on 3rd and 4th july -21.who are qualified in written test are eligible for interview, but who are in service candidate must submit NOC.Due due to lack of time and administrative reasons i am unable to get NOC within a week. based on above situation i have some doubts please clarify: 1.I will attend the exam and interview without NOC but i'm giving undertaking above said reasons to employer at the time of Interview is there any chance to accepting my undertaking? 2.incase they are not accepting i will attend as a fresher, incase i am selected i will submit NOC and relieving order to concerned but employers are accepted or not? I request you to sir,please give me suggestions.