As you have used NABARD Grade A hashtag, so I shall assume you are asking the question with reference to NABARD Grade A Examination.

Examination Dates ->

As of now, no notification has been released that shows the Application Date and the Exam Date. In 2021, the Application date was released on 17th July, 2021 and the Exam (Prelims) was conducted on 18th September, 2021. So this year in 2022, you can expect the exam happening around those dates. So you are suggested to visit its official website - www.nabard.org on a frequent basis for the latest updates regarding NABARD. The duration of the Prelims exam is 2 hours (120 minutes).

Regarding exam preparation, 1 year is sufficient for a thorough preparation.

To go through the latest articles regarding NABARD, you may visit the link - Latest Articles around NABARD Grade A Exam (careers360.com)