Mastering Full-Stack: Top 50 Interview Questions Revealed

In the fast-paced world of technology, full-stack developers are in high demand for their ability to work on both the front-end and back-end of web applications. To help you prepare for your next full-stack developer interview, we've compiled a list of the top 50 interview questions that cover a wide range of topics. Let's dive in!

Front-End Development

1. What is the difference between null and undefined in JavaScript?

// Code example
let x = null;
console.log(typeof x); // Output: object
let y;
console.log(typeof y); // Output: undefined

1. Explain the concept of event bubbling in the DOM.

Back-End Development

1. What is RESTful API and why is it important?

// Code example
// GET request to retrieve user data
app.get('/users', (req, res) => {
  // Code to fetch user data from the database
});

1. How does Node.js handle asynchronous operations?

Databases

1. What is the difference between SQL and NoSQL databases?

// Code example
// SQL query to select all users from a table
SELECT * FROM users;

1. Explain the ACID properties in database transactions.

Data Structures and Algorithms

1. What is the difference between a stack and a queue?

// Code example
// Implementing a stack in JavaScript
class Stack {
  constructor() {
    this.items = [];
  }
}

1. How does a binary search algorithm work?

System Design

1. How would you design a scalable chat application?

// Code example
// Using WebSockets for real-time communication
const socket = io('http://localhost:3000');

1. Explain the concept of load balancing in a distributed system.

These are just a few of the top 50 full-stack interview questions that you may encounter. By thoroughly understanding these concepts and practicing your coding skills, you'll be well-equipped to impress your interviewers and land your dream full-stack developer role. Happy coding!