Hello,
First of all don't worry. Instructions will be passed by the authorities from time to time. Prior to exam you will be informed about the online proctored exam, how to proceed and other set of instructions. You need to follows all those carefully. Please check your registered mail ID and registered phone number as you will be communicated through these sources. You need to have an update version of google chrome and download the extension given in the information brochure. Right now the link not active so I cannot share that link now. Please go through the information brochure to know the system requirements and exam process. The link is given below
https://www.nata.in/NATA_2020_Brochure-v1.3FINAL.pdf?v=c2988c7f8233d6565565
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