Hello Batila Amulya. Thanks for contacting Careers360 and we hope we will be able to answer your query. 

I would like to direct your attention to this Quora question for more information about the NATA exam:

• https://www.quora.com/How-do-I-prepare-for-the-NATA-exam-for-architecture

The first answer contains some links and videos for practicing the drawing questions. Hope this helps you and all the very best!