What are your experiences of IISER Int. PhD interview and exams? What are some sample questions given in the entrance test or interviews? What is the pattern of the entrance test at IISER Mohali?

One of my friends took the entrance test for integrated Ph.D. program in Physics at IISER Mohali. His experience throughout the entire process is discussed below in brief. 

• The selection process includes a written test followed by an interview. The written test takes around 60-90 mins. Students who clear the test are shortlisted for the interview. 
• The question asked in the test are objective type. The difficulty level is moderate. If you have a thorough understanding of your undergraduate subjects, you can easily solve the paper in time. You will need to wait for a couple of hours for the result to be displayed. 
• The interview will last for about 20-40 mins. The interview panel usually consists of four faculty members. They usually ask basic questions to test your fundamental knowledge of the subject. If you don’t know the answer to a particular question, it is better if you say it clearly, rather than guessing.