Paytm Payments Bank React Js Frontend Developer Interview Questions and Answers

Create a stopwatch in React js

• Use state to keep track of time

• Use setInterval to update time every second

• Display time in HH:MM:SS format

Polyfills are code that provides modern functionality on older browsers that do not natively support it.

• Polyfills are used to fill in the gaps in browser support for certain features or APIs.

• They are typically implemented using JavaScript.

• Polyfills can be used for features like Promises, Fetch API, and ES6 syntax on older browsers.

• They help ensure that a website or application works consistently across different browse