Full Stack Developer Interview Questions 2025 | Web Development Interview Questions | Intellipaat


Summary

The video provides an in-depth overview of fullstack web development, covering topics such as JavaScript fundamentals, optimizing page loading, API types (SOAP, REST, GraphQL), CSS Box Model, React concepts (state management, Context API, performance optimization), Node.js asynchronous programming, Express.js middleware and routing, MongoDB usage (replica sets, indexes, sharding, aggregation) and handling sessions, CORS, and errors. The content includes practical demonstrations and guides on creating RESTful APIs, connecting applications to MongoDB, and comparing MongoDB with relational databases, focusing on real-world applications and best practices for efficient and secure web development.


Introduction to Fullstack Web Development

Introduction to the importance of fullstack web development in today's digital era and the demand for fullstack developers.

Fundamentals of JavaScript

Explains the fundamentals of JavaScript, including hoisting, variable initialization, and different types of hoisting.

Local Storage vs. Session Storage

Comparison between local storage and session storage, detailing their differences in permanence and expiration time.

Optimizing Page Loading Time

Tips for optimizing page loading time, including image optimization, minimizing HTTP requests, and using caching.

Differences Between SOAP and REST

Comparison of SOAP and REST APIs, highlighting their data formats, connection types, and ease of use.

GraphQL vs. REST APIs

Explaining the differences between GraphQL and REST APIs in terms of data fetching efficiency and flexibility.

CSS Box Model

Breakdown of the CSS Box Model components, including content, padding, border, and margin.

Class Selector vs. ID Selector in CSS

Explanation of the differences between class selectors and ID selectors in CSS, focusing on specificity and reusability.

Primitive vs. Non-Primitive Data Types in JavaScript

Differentiates between primitive and non-primitive data types in JavaScript, including examples of each type.

Hoisting in JavaScript

Detailed explanation of hoisting in JavaScript, covering variable hoisting, function hoisting, let, and const variables.

Event Bubbling vs. Capturing

Comparison of event bubbling and capturing in JavaScript, illustrating how events propagate in the DOM hierarchy.

Strict Mode in JavaScript

Importance of using strict mode in JavaScript for stricter parsing and error handling to prevent common bugs.

Cookies vs. Local Storage

Differences between cookies and local storage, highlighting their uses in tracking user behavior and storing data on the client side.

API Rate Limiting and Security Measures

Explanation of API rate limiting and security measures like captchas and honeypots to protect APIs from abuse.

Virtual DOM in React

Introduction to virtual DOM in React for efficient UI updates without full re-rendering of the entire page.

State Management in React

Overview of state management in React, covering component state, props drilling, and state management libraries like Redux.

Component Lifecycle in React

Explanation of the component lifecycle in React from mounting to unmounting, using an analogy of daily activities.

Context API vs. Props in React

Comparison of Context API and props in React, emphasizing the advantages of global state sharing and avoiding prop drilling.

Performance Optimization in React

Tips for optimizing performance in React applications, including pure components, context usage, and reducing unnecessary renders.

Higher Order Components in React

Overview of higher-order components in React and their role in enhancing functionality and reusability.

Handling Forms in React

Explanation of handling forms in React, emphasizing managing form inputs, validation, and submission.

Handling Forms in React

Explanation of handling forms in React, including importing U state, setting input values, preventing default submission behavior, handling change functions, and creating user forms.

Server-Side Rendering in Web Development

Overview of server-side rendering (SSR) in web development, its benefits, and examples of SSR in popular websites like Instagram.

Introduction to Redux in React

Explanation of Redux in React, its role in managing global state, and the process of creating a Redux store for state management.

Asynchronous Programming in Node.js

Discussion on asynchronous programming in Node.js, including analogies to real-life scenarios and the benefits of asynchronous operations.

Event Loop in Node.js

Explanation of the event loop in Node.js, its role in handling asynchronous operations, and analogies to a chef handling tasks.

Middleware in Express.js

Explanation of middleware in Express.js, its types (application level, router level, error handling), and how middleware functions interact with requests and responses.

Streams in Node.js

Explanation of streams in Node.js, including types of streams (readable, writable, duplex, transform) and their usage in handling large data sets efficiently.

Handling Callback Hell in JavaScript

Description of callback hell, its issues, and solutions like promises, async/await to improve code readability and manage nested callback functions.

Handling Errors in Node.js

Discussion on handling errors in Node.js, including methods like try-catch blocks, global error handling, and ensuring proper error handling for promises.

Routing and Authorization in Express.js

Explanation of handling routing, request parameters (params, query, body), and user authentication and authorization in Express.js applications.

Understanding CORS and Handling in Express

Explanation of CORS (Cross-Origin Resource Sharing) and its importance in handling cross-origin requests in Express applications for secure data access.

Introduction to ExpressJS Sessions

Explanation of sessions in ExpressJS using middleware like Express session for session management.

Creating Sessions in ExpressJS

Detailed guide on creating sessions in ExpressJS including setting secrets, handling tokens, resaving sessions for existing users, and managing sessions for new users.

Creating a RESTful API

Demonstration of creating a simple RESTful API for a to-do list including adding, updating, and deleting todos, and handling tokens and buttons for API operations.

Connecting Application to MongoDB with Mongoose

Instructions on connecting an application to MongoDB using Mongoose, creating clusters on MongoDB Atlas, and handling errors during the connection process.

Main Differences Between MongoDB and Relational Databases

Comparison of MongoDB and relational databases in storing data and data relationships, highlighting the flexibility of MongoDB and its suitability for real-time analytics.

Replica Sets in MongoDB

Explanation of replica sets in MongoDB, including primary and secondary nodes, data safety and security, write and read operations, consistency levels, and multi-document transactions.

Importance of Indexes in MongoDB

Role of indexes in MongoDB for faster query performance, improved sorting, filtering efficiency, and locating data without reading every page.

Performing Aggregation Operations in MongoDB

Overview of performing aggregation operations in MongoDB to transform and analyze data in collections, with examples like calculating averages, totals, and grouping data.

Sharding and Load Balancing in MongoDB

Explanation of sharding in MongoDB for distributing data across multiple shards for better performance, scalability, and load balancing in handling large datasets and high traffic.

Handling Operations in MongoDB

Guide on handling operations in MongoDB including querying, updating, deleting, aggregating data, and the role of Object IDs in MongoDB documents.

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