Metricoid Technology Solutions interview questions

1st Technical Round In this round they gave us a pic of signup form (consisting of input fields like Name, number,email,& password) & told us to create frontend like that only and the data should pass to the backend and then save the data in a json file.Also check whether the email is already present in a json file if present then don't save it again. 2nd round Face-to- face interview 1. what is jwt? Who creates, maintains, & removes the JWT? 2. how to connect mongodb with node.js 3. Suppose you have an input field, if input field value is wrong then you have to do the border color as red then what are the approaches that you will follow? 4. ReactsJs form basics like how will you handle in form submission each filed s is filled or not? Do the basics clearly you got thesee

Write a php code on paper