How should I prepare for NITIE Mumbai through CAT?

As some of my friends studied at NITE Mumbai, there are certain facts you should know before starting the preparations.

• In NITIE Mumbai, for the course of PGDIM, the students with engineering backgrounds are only taken into consideration. 
• After the shortlisting is completed and a student is called for the GD and PI. 
• The score of CAT is not taken into account and the whole admission process takes place on the campus. 
• Now, for the final merit list, it's the scores of GD and PI, on which a student's admission is dependent. 
• For the GD round, it can be based on topics like IRP and for the PI round, the professors can ask questions based on the graduation. 
• Also, current affairs are very important for the PI as what's happening around the globe is something everyone should be aware of. 

The questions in PI can be of puzzle form or from subjects like linear programming. Grab some of the weaknesses and strengths and effectively explain them.