Nift exam basically has three parts:-

1-GAT-General ability test

2-CAT- creative ability test

3-SITUATION TEST.

In GAT-they ask about general science, gk,English, little maths,current affairs.

In CAT-this test is to check drawing skills of yours. Five random topics will be given to you and they asked you to express these through drawing and creative writing.All you have to do is analyse the  topic and come up withe good idea.

In SITUATION TEST- you will be provided with some craft material and you have to develop some prototype related to given topics and use the material creatively.

For the Details You can go with the given link:-

https://design.careers360.com/articles/nift-exam-pattern