Hello Ashutosh,

The National Institute of Open Schooling (NIOS) conducts secondary and senior secondary level every summer during April. NIOS provides open schooling at national as well as the global level and shares resources and study material to the students.

You can look forward to solving sample papers and questions papers from previous years to boost up your preparation.

The previous years questions papers can be found here:

https://school.careers360.com/articles/nios-question-papers

You can also obtain the same from the official website of the NIOS:

https://www.nios.ac.in/student-information-section/question-paper-of-previous-year-examination-academic.aspx

Hope this helps you. We wish you the best for your future endeavours!

Regards