Web Development
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Learn Web Development From Scratch

0️⃣ HTML / CSS
1️⃣ JavaScript
2️⃣ React / Vue / Angular
3️⃣ Node.js / Express
4️⃣ REST API
5️⃣ SQL / NoSQL Databases
6️⃣ UI / UX Design
7️⃣ Git / GitHub

Admin: @love_data
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Which HTTP method is used to fetch data?
Anonymous Quiz
17%
A. POST
5%
B. PUT
77%
C. GET
0%
D. DELETE
Which function is used to start an Express server?
Anonymous Quiz
35%
B. app.listen()
32%
C. app.start()
14%
D. server.begin()
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Now, let's move to the next topic in the Web Development Roadmap:

🗄️ Databases (SQL + MongoDB Basics)

Now you’ll learn where applications store their data 💾

👉 Without databases:
• No login system
• No products
• No Instagram posts
• No user accounts

🧠 1. What is a Database?
👉 Database = Organized collection of data

💡 Example:
• Users
• Products
• Orders
• Messages

⚔️ 2. Types of Databases

🟦 SQL Database (Relational)
Examples:
• MySQL
• PostgreSQL

👉 Stores data in tables
id name age
1 Arushi 25

🟩 NoSQL Database
Example:
• MongoDB

👉 Stores data as documents (JSON-like)
{
"name": "Arushi",
"age": 25
}

🔥 3. SQL Basics
SELECT
SELECT * FROM users;
👉 Fetch all users

WHERE
SELECT * FROM users
WHERE age > 18;

INSERT
INSERT INTO users(name, age)
VALUES("Arushi", 25);

4. CRUD Operations (Very Important)
Create → Add data
Read → Fetch data
Update → Modify data
Delete → Remove data

🌐 5. MongoDB Basics
Insert Document

db.users.insertOne({
name: "Arushi",
age: 25
});

Find Data
db.users.find();

🔗 6. Backend + Database Flow
Frontend → Backend API → Database → Response → Frontend

💡 Example:
• User logs in
• Backend checks DB
• Returns success/failure

🎯 Mini Project
👉 Build:
• User database
• Product database
• Todo app with database

💡 Pro Tips
• Learn SQL deeply 🔥
• Understand CRUD operations clearly
• Practice real datasets

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4
Which of the following is a SQL database?
Anonymous Quiz
10%
A. MongoDB
1%
B. Express.js
88%
C. MySQL
2%
D. Node.js
1
Which SQL command is used to retrieve data?
Anonymous Quiz
11%
A. INSERT
16%
B. UPDATE
71%
C. SELECT
2%
D. DELETE
4
MongoDB stores data in the form of:
Anonymous Quiz
13%
A. Tables
7%
B. Rows
76%
C. JSON-like documents
4%
D. Excel sheets
2
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Now, let's move to the next topic in the Web Development Roadmap:

🔗 Full Stack Integration (Frontend + Backend + Database) 🚀🔥

Now comes the most exciting part 🎯
👉 Connecting everything together into a real application

This is where you become a Full Stack Developer 🚀

🧠 1. What is Full Stack Development?
👉 Building:
• Frontend 🎨
• Backend ⚙️
• Database 🗄️

Together in one application

🔗 2. Full Stack Flow
Frontend → API Request → Backend → Database → Response → Frontend

💡 Example: User logs in → backend checks DB → frontend shows dashboard

3. Frontend Sends Request
Using fetch() or API calls

fetch("http://localhost:3000/users")
.then(res => res.json())
.then(data => console.log(data));


👉 Frontend asks backend for data

🚀 4. Backend Creates API

app.get("/users", (req, res) => {
res.json([
{ name: "Sid" }
]);
});


👉 Backend sends response

🗄️ 5. Database Stores Data
Backend connects with:
• MySQL
• MongoDB

💡 Example:
• Users
• Products
• Orders

🔐 6. Authentication (Very Important 🔥)
👉 Login systems use:
• JWT (JSON Web Token)
• Sessions

Login Flow:
User Login → Backend Verify → Generate Token → Access Granted

🌐 7. MERN Stack (Popular Stack 🚀)
Technology Purpose
MongoDB Database
Express.js Backend Framework
React Frontend
Node.js Runtime

👉 MERN = Very popular in startups & jobs

🎯 8. Real Project Ideas
Todo App
Authentication System
E-commerce Website
Blog Platform
Dashboard App

💡 Pro Tips
• Understand API flow clearly
• Learn authentication properly
• Build projects instead of only tutorials

Tap ❤️ For More
9👍3
Which part of an application sends API requests?
Anonymous Quiz
19%
A. Database
48%
B. Frontend
26%
C. Server hardware
7%
D. Browser cache
Which technology belongs to the MERN stack?
Anonymous Quiz
9%
A. Django
80%
B. MongoDB
5%
C. Laravel
6%
D. PostgreSQL
4
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