Node JS - Commonly asked INTERVIEW Questions and Answers

The below are the commonly asked Node JS Interview questions
1)What is Node.js, and how does it differ from other server-side technologies like Apache or PHP?
2)What is callback function in Node.js , and why are they commonly used in asynchronous programming.
3)What is the purpose of the package.json file in a Node.js project?Can you explain the key properties found in this file?
4)Explain the difference between require and import statements in Node.js.When and why would you use one over the other?
5)What is the middleware in the context of Express.js? Can you give an example of how you would use middleware in an Express application?
6)What is RESTful API, and how can you create one using Node.js and Expree.js? Explainthe main HTTP METHODS used in RESTful APIs.
7)What is the purpose of the Node Package Manager (NPM), and how do you use it to manage dependencies in a Node.js project?
8)Why is it important to hash passwords in a web application?