Hi Sangram, 

Nest stands for National Eligibility and Scholarship Test which is conducted by Aakash whivmch is on 7th April 2019 at the Aakash study centres 

The students that have taken admission into Aakash through ANTHE or ACST are not elligible 

Through NEST one can get into Aakash with a fee waiver upto 80% 

You can download the last year exam from this link : https://drive.google.com/file/d/1JaZgnr17wU-SmXL3DZJEt2iGFLAg3pQX/view?usp=sharing