Interview seem to be moderate for the role of salesforce developer. for the freshers questions will be majorly asked on the final year project. And any programming language you are comfortable with basic question on programming language that you specify. Basics of Data structure and algorithms. Interviewer might ask you to share the screen and write the code on the given problem statement. Problem statement will be of moderate or basic level. If you prepare any one programming language thoroughly along with DS and Algorithms Interview can be cleared.