What type of questions are asked in dayalbagh educational institute interview btech course?

You will be asked fundamental STEM questions. The difficulty level will be basic to moderate in general. Sometimes they ask hard questions too like curve tracing in Mathematics. Prepare Mathematics fundamentals, Physics basics, Current affairs, and GK in depth. 

You should also keep in mind that a good interview doesn’t guarantee your selections. There are other factors at play, such as Written Test Performance, Reservation Quota, etc.