You can watch the entire course here:- https://goo.gl/zor5oY
Personal Interview (PI) consists of various types of questions. It is easy to prepare for them once you understand what type of questions you are going to face. Just before PI, you would have attended either GD or WAT or both.
You will be asked questions based on your performance in GD or WAT. Although it is difficult to prepare for these questions beforehand, this lesson gives you some pointers on to tackle them.
For more lessons/course on CAT Preparation, please visit:- https://unacademy.com/cat-preparation/