🚀 22 Must-Know Node.js Questions for Freshers! 🚀

Ready to ace your **Node.js interview** as a fresher? These questions will help you sharpen your skills and build confidence for your interview! 💡

1️⃣ What is Node.js, and why is it used?

2️⃣ How does Node.js differ from traditional server-side programming?

3️⃣ What is the **Node.js event loop**, and how does it work?

4️⃣ What are the **key features** of Node.js?

5️⃣ Explain the concept of **non-blocking I/O** in Node.js.

6️⃣ What is a **callback function**, and how is it used in Node.js?

7️⃣ What is the role of the **`require()`** function in Node.js?

8️⃣ What is **`package.json`**, and what is its purpose?

9️⃣ How do you install **packages using npm** in Node.js and what are other options for installing?

🔟 What is the purpose of the **`fs` (File System)** module in Node.js?

1️⃣1️⃣ Explain the difference between **synchronous** and **asynchronous** functions in Node.js.

1️⃣2️⃣ What are **streams** in Node.js? How are they used?

1️⃣3️⃣ What is **Express.js**, and why is it commonly used with Node.js?

1️⃣4️⃣ How do you create a simple **HTTP server** in Node.js?

1️⃣5️⃣ What is the role of **middleware** in an Express.js application?

1️⃣6️⃣ How would you handle **errors** in Node.js?

1️⃣7️⃣ What are **Promises**, and how are they different from callbacks in Node.js?

1️⃣8️⃣ What is the difference between **`process.nextTick()`** and **`setImmediate()`**?

1️⃣9️⃣ What is the purpose of the **`global`** object in Node.js?

2️⃣0️⃣ What is **npm**, and what is the difference between **`npm install`** and **`npm install --save`**?

2️⃣1️⃣ What is the difference between **`Buffer`** and **`String`** in Node.js?

2️⃣2️⃣ How would you perform basic **CRUD operations** using Node.js and MongoDB?

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