Hey:)
Thanks for reaching out!
You can attempt the NEST exam multiple times since there's no fixed limit on the number of attempts, as long as you meet the eligibility criteria for that particular year. On the other hand, the IISER Aptitude test (IAT) allows a maximum of three attempts in consecutive years after your class 12th. Both exams are conducted once a year,so, stay updated on eligibility rules and make the best use of the opportunity.
Hope this helps!
Candidates can download NEST Question/Sample Papers from here.
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