What is the big challenge facing the students after they graduate in Program's UG degree, PG degree, Diploma, etc?

lack of practical exposure to their relevant subject. better to take internship programs in your holidays, i will help you in your fucture

The big problem is how to enter in a professional market, how to get good job or how they can sell their services, in other words after completion of studies students are like new product how they can approach to the customer in good price when customers are scared to do experiments.