How should I prepare for NITIE GDPI?

There are two main things to consider when you are preparing for GD.

First is your basic knowledge. NITIE's GD subjects are usually related to current events given in a broad sense, such as freedom of speech. It will help you getting brownie points. Make sure to keep up with current affairs. Read newspapers and be quite forthcoming about the news. Stay informed about government policies by reading about them.

Secondly, your self-assurance and body language. Be confident in your statements, don't be nervous, and don't stare at the panel. Participate in mock GDs, read newspapers aloud, and try to converse in English with friends to strengthen your skills.

Make sure you have complete control of your CV for PI. The interview is nothing more than a conversation between you and the interviewer that is driven by you. It usually focuses on what you've accomplished in your life, whether it's school, graduation, or professional experience. 

Prepare some fundamental human resources questions and be transparent about your thought process. In the interview, be straightforward and don't mix words. Be confident and assertive.