NOC is required to take admission in Flexible shift timing B.Tech program?

Yes, the no-objection certificate is required to register for the B.Tech Flexible Timing program. The other admission requirement is that the candidate must earn 50% from an approved institute or college and have working experience in a similar field. 

B.Tech Flexible timing program is designed for working professionals. So the classes are conducted in the evenings, on weekends or holidays. 

Yes, when you want to get an admission in a Flexible Shift Timing B.Tech program, which is specifically set to admit working professionals, you will usually be asked to furnish a No Objection Certificate (NOC) with your employer. NOC is official permission that your employer confirms he/she knows and agrees that you want to take further education, which might imply changes in your working hours or duties.

Your university may not require you to follow all the requirements, but the majority of them do require the NOC as it makes the procedure more transparent and guarantees your manageable work load as well as studying skills. It is always a good idea to make sure that you check the definite admission policies of the university you are applying to.