AWS Introduction

1. What is AWS?

Amazon Web Services (AWS) is a cloud computing platform that provides on-demand IT resources such as compute, storage, databases, networking, security, analytics, and more over the internet.

Instead of purchasing and maintaining physical servers, organizations can use AWS resources whenever they need them and pay based on usage.

2. What is Cloud Computing?

Cloud Computing means delivering computing resources over the internet.

These resources can include:

• Servers
• Storage
• Databases
• Networking
• Software
• Analytics
• Artificial Intelligence
• Security

For example, instead of buying a physical server for your application, you can create an Amazon EC2 instance on AWS and run your application there.

3. Why AWS?

AWS is widely used because it provides:

• Scalability – Increase or decrease resources according to demand.
• Flexibility – Choose different services and configurations.
• High Availability – Build applications that remain available even when failures occur.
• Global Infrastructure – Deploy applications closer to users around the world.
• Security – Provides multiple security and identity-management services.
• Pay-as-you-go Pricing – Generally pay for the resources you consume.
• Large Service Portfolio – Provides services for compute, storage, databases, networking, DevOps, AI/ML, and more.

4. AWS Services

AWS provides many cloud services. Some of the most important services for beginners are:

5. AWS Global Infrastructure

AWS infrastructure is organized into several important components:

Region → Availability Zone → Data Center

AWS Region

A Region is a geographical area containing multiple Availability Zones.

Example:

• Mumbai Region
• Singapore Region
• London Region
• US East (N. Virginia)

Availability Zone

An Availability Zone (AZ) is one or more discrete data centers within an AWS Region.

A Region normally contains multiple Availability Zones so applications can be designed for high availability.

6. AWS Region vs Availability Zone

7. How AWS Works

A simplified AWS workflow looks like this:

User → Internet → AWS Region → AWS Service → Application/Data

For example:

User → Internet → Mumbai Region → EC2 → Web Application

8. AWS Management Console

The AWS Management Console is a web-based interface through which users can create and manage AWS resources.

Using the console, you can:

• Launch EC2 instances
• Create S3 buckets
• Create databases
• Configure VPC
• Manage IAM users
• Monitor resources

9. AWS CLI

AWS CLI (Command Line Interface) allows users to manage AWS services from a terminal or command prompt.

Example:

aws s3 ls

This command lists S3 buckets accessible to the configured AWS identity.

10. AWS SDK

AWS SDKs allow developers to interact with AWS services programmatically from programming languages such as:

• Python
• Java
• JavaScript
• C++
• Go
• .NET

For example, a Python application can use the AWS SDK to upload a file to Amazon S3.

11. Advantages of AWS

• No need to purchase physical servers
• Easy resource provisioning
• Flexible scaling
• Global deployment
• Wide range of managed services
• Pay-as-you-go model
• Automation support
• Suitable for startups as well as large enterprises

12. AWS Use Cases

AWS can be used for:

• Website Hosting
• Web Applications
• Mobile Applications
• Data Storage
• Backup and Disaster Recovery
• Big Data
• Machine Learning
• DevOps and CI/CD
• Serverless Applications
• Enterprise Applications
• Gaming Applications

13. AWS Beginner Roadmap

Aap website par AWS Introduction ke baad learning path is order mein rakh sakte ho:

AWS Introduction
      ↓
AWS Global Infrastructure
      ↓
AWS IAM
      ↓
AWS EC2
      ↓
AWS S3
      ↓
AWS VPC
      ↓
AWS RDS
      ↓
AWS Load Balancer
      ↓
AWS Auto Scaling
      ↓
AWS CloudWatch
      ↓
AWS Route 53
      ↓
AWS CloudFront
      ↓
AWS Lambda
      ↓
AWS CloudFormation
      ↓
AWS DevOps

14. AWS Introduction – Interview Questions

1. What is AWS?
2. What is Cloud Computing?
3. What are the advantages of AWS?
4. What is an AWS Region?
5. What is an Availability Zone?
6. Difference between Region and Availability Zone?
7. What is AWS Management Console?
8. What is AWS CLI?
9. What is AWS SDK?
10. What is the AWS Free Tier?
11. What is the pay-as-you-go model?
12. Name some commonly used AWS services.
13. What is AWS Global Infrastructure?
14. Why is AWS used?
15. What is the difference between traditional infrastructure and cloud infrastructure?