I have selected the top 10 major questions you should know as a React developer in 2023, whether you are interviewing for a hired position or not.
To get the best results out of this guide, make sure to try to answer each question yourself before looking at the answers.
Let’s get started!
01. What is React and why is it useful?
Ans: React is a JavaScript library for building user interfaces. It is used for building web applications because it allows developers to create reusable UI components and manage the state of the application in an efficient and organized way.
02. What is the virtual DOM and how does it work?
Ans: The Virtual DOM (Document Object Model) is a representation of the actual DOM in the browser. It is used by React to optimize the performance of updates to the UI by only updating the parts of the DOM that have changed.
When a component’s state or props change, React will first create a new version of the Virtual DOM that…