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Mohit Decodes is a YouTube channel that simplifies Frontend & Backend Development, MERN, MEAN, NextJS, Python, Django, FastApi, NestJS, JavaScript, React, Angular, AI & Tech Updates!

28/10/2026

Can you find the First Non-Repeating Character in a string? 🤔

💻 Input: “aabbcde”
✅ Output: “c”

Learn two approaches:
🚀 Frequency Map — O(n)
🐢 Nested Loops — O(n²)

Interview mein aise coding questions ki practice zaroor karo! 💯

Follow Mohit Decodes for more JavaScript interview questions and coding tips! 🔥

25/10/2026

Can you remove duplicates from an array in JavaScript? 🤔

✅ Using Set — Optimized approach
✅ Without Set — Using loops
✅ Time & Space Complexity explained!

📌 Save this reel for your next coding interview and follow Mohit Decodes for more JavaScript interview questions!

21/10/2026

Node.js Todo App Project – Part 11 | Error Handling & Middlewares 💻

Let's make our Todo Backend API cleaner and more professional! 🔥

In Part 11, we'll implement custom error handling and reusable middleware using Node.js and Express.

✅ Create a Global Error Handler
✅ Build an asyncHandler Try/Catch Wrapper
✅ Create Standardized Success & Error Responses
✅ Handle Invalid Routes
✅ Understand next() for Error Handling
✅ Organize Controllers, Middlewares & Utilities
✅ Follow Real-World Backend Best Practices

🎯 Complete your Todo Backend API series with Mohit Decodes!

📺 Watch the series and learn backend development step by step in Hindi.

21/10/2026

Node.js Todo App Project – Part 10 | Delete Todo API (DELETE) 💻

It's time to complete our Todo App CRUD operations! 🔥

In Part 10, we'll build the DELETE /api/todos/:id API using Node.js, Express & Mongoose.

✅ Create the DELETE API route
✅ Validate MongoDB ObjectIDs
✅ Delete Todo using findByIdAndDelete()
✅ Handle invalid IDs and Todo Not Found errors
✅ Return a success message in JSON
✅ Test with Postman / Thunder Client

🎯 Complete your Todo Backend API step by step with Mohit Decodes!

📺 Watch the series and learn backend development in Hindi.

20/10/2026

Node.js Todo App Project – Part 9 | Toggle Todo Status (PATCH) 💻

Want to mark a Todo as completed or incomplete with a single API request? ✅🔥

In Part 9, we'll build the PATCH /api/todos/:id/toggle API using Node.js, Express & Mongoose.

📌 What you'll learn:
✅ Toggle the isCompleted status
✅ Write clean controller logic
✅ Validate MongoDB ObjectIDs
✅ Handle Todo Not Found errors
✅ Return the updated Todo
✅ Test the API with Postman / Thunder Client

🎯 Continue building your complete Todo Backend API with Mohit Decodes!

📺 Watch the series and learn backend development in Hindi.

20/10/2026

Node.js Todo App Project – Part 8 | Update Todo API (PUT) 💻

Let's learn how to update existing Todo items using Node.js, Express & MongoDB! 🔥

In Part 8, we'll build the PUT /api/todos/:id API and implement:

✅ Update Todo title & description
✅ Validate request fields
✅ Handle invalid MongoDB ObjectIDs
✅ Handle Todo Not Found errors
✅ Use Mongoose findByIdAndUpdate()
✅ Return the updated Todo in JSON
✅ Test with Postman / Thunder Client

🎯 Build your complete Todo Backend API step by step with Mohit Decodes!

📺 Watch the series and learn backend development in Hindi.

19/10/2026

Node.js Todo App Project – Part 7 | Get Single Todo by ID

Learn how to fetch a specific Todo from MongoDB using its ID! 💻🔥

In Part 7, we'll build a GET /api/todos/:id API using Node.js, Express & Mongoose.

✅ Fetch Todo using findById()
✅ Validate MongoDB ObjectIDs
✅ Handle invalid IDs
✅ Return clean JSON responses
✅ Handle Todo Not Found errors
✅ Follow REST API best practices

🎯 Build your Todo Backend API step by step with Mohit Decodes!

📺 Watch the series and learn backend development in Hindi.

19/10/2026

Node.js Todo App Project – Part 6 | Get All Todos API

Ready to make your Todo API more powerful? 🔥💻

In Part 6, we'll fetch all Todos from MongoDB and add real-world API features using Node.js, Express & Mongoose.

✅ Get All Todos — GET /api/todos
✅ Pagination with page & limit
✅ Sorting with sortBy & order
✅ Search Todos by title
✅ Test APIs using Postman / Thunder Client

🎯 Learn to build professional REST APIs step by step with Mohit Decodes!

📺 Watch the series and learn backend development in Hindi.

18/10/2026

Node.js Todo App Project – Part 5 | Create Todo API (POST) 💻

Let's build our first CRUD API! 🔥

In Part 5, we'll create a POST API to save new Todo items in MongoDB using Node.js, Express & Mongoose.

✅ Create a Todo Controller
✅ Set up POST /api/todos
✅ Validate request data
✅ Save Todo using Mongoose create()
✅ Handle errors and send JSON responses
✅ Test the API using Postman / Thunder Client

🎯 Build a real-world Todo Backend API step by step with Mohit Decodes!

📺 Watch the series and learn backend development in Hindi.

18/10/2026

🚀 Node.js Todo App Project – Part 4 | Create Todo Model with Mongoose Schema

Let's build our Todo Model! 💻🔥

In Part 4, we'll learn how to define a Mongoose Schema and structure our Todo data in MongoDB.

✅ Create a Todo Schema
✅ Add title, description & isCompleted fields
✅ Apply validation using required and default
✅ Enable createdAt & updatedAt timestamps
✅ Export the Todo Model for CRUD APIs

🎯 Learn backend development step by step with Mohit Decodes!

📺 Watch the series and build your own Todo Backend API in Hindi.

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