Hello Sibi ! 

NIFT exam happens in 2 rounds.

The 1st round has 2 parts :-

1. GAT (generalability test)

In this, questions related to your basic knowledge of maths, science, English, general knowledge are asked. 

2. CAT (creative ability test)

In this, you are are given questions or scenarios where you have to draw or design objects. 

If you qualify this you will have to give 2nd round which is the situation test. 

In this, you will have to build a 3d model based on the situation you got and materials given.

You can solve previous years question papers.

All the best !