Chapter 95: AWS Examples

What is AWS Examples

First — very important clarification so we don’t waste time:

There is no official AWS service, product, certification, or category literally named “AWS Examples”.

When people (especially students, freshers, Telugu tech WhatsApp groups, YouTube comment sections, Reddit India threads, or LinkedIn learners) type or ask “AWS Examples”, they almost always mean one of these three things:

1. Real-world, practical examples of how actual companies / startups / projects use different AWS services (not just theory)
2. Code / architecture / configuration examples for common tasks (Terraform, CDK, CLI commands, CloudFormation templates, etc.)
3. Exam-style scenario questions with detailed explanations (especially for Cloud Practitioner, Solutions Architect Associate, Developer Associate)

So today we’re going to cover all three interpretations — because they are very closely related — in a structured, honest, practical way that actually helps you.

Let’s go slow, like a real classroom session — whiteboard style.

1. Interpretation #1 — Real-World / Practical Examples of AWS Services in Use

This is by far the most common meaning when someone asks “give me AWS examples”.

People want to see how real companies actually combine services, not just the official one-paragraph description.

Here are the most common real-world example patterns I see in Hyderabad startups & mid-size companies in 2026:

Pattern A — Short-video / Reels / Food delivery style app (very popular in Hyderabad)

Core architecture (2026 typical):

• Frontend: React / Next.js hosted on S3 + CloudFront (static site, global low-latency delivery)
• Backend: API Gateway + Lambda (serverless APIs) or ECS Fargate (containerized Node.js / Python)
• Authentication: Cognito (user sign-up, social login, JWT tokens)
• Database: DynamoDB (user profiles, sessions, trending list) + Aurora PostgreSQL Serverless v2 (orders, restaurants, payments)
• Storage: S3 (user-uploaded videos/photos) + CloudFront (fast global delivery, signed URLs)
• Video processing: User uploads raw video → S3 Event Notification → Lambda triggers Elemental MediaConvert or AWS Elastic Transcoder → outputs HLS streams to S3
• Recommendation: Amazon Personalize (real-time “For you” feed)
• Monitoring: CloudWatch + X-Ray (traces) + CloudTrail (audit) + GuardDuty (threats)
• Cost control: Savings Plans + Budgets alerts + Trusted Advisor weekly check

Monthly bill example (moderate traffic — 50k–200k DAU):

• ~₹60,000–1.5 lakh (mostly compute + S3 + DynamoDB + MediaConvert)

Pattern B — Fintech / UPI / lending app (very common in Financial District)

Core architecture:

• Authentication & KYC: Cognito + Amazon Rekognition (face match) + Textract (Aadhaar/PAN extraction) + Comprehend (fraud text analysis)
• Transactions: DynamoDB (high-scale read/write) + Aurora PostgreSQL (ACID transactions, reporting)
• Fraud detection: Amazon Fraud Detector (real-time scoring)
• Notifications: SNS + Pinpoint (SMS, push, email)
• Audit & compliance: CloudTrail (multi-region) + Security Hub + Macie (PII discovery) + S3 Object Lock (immutable logs for RBI)
• Monitoring: CloudWatch + X-Ray + DevOps Guru (ML anomaly detection)

Monthly bill example (10k–50k daily transactions):

• ~₹80,000–2.5 lakh (mostly DynamoDB + Aurora + Fraud Detector + Rekognition/Textract)

2. Interpretation #2 — Code / Configuration / Architecture Examples

This is the second most common meaning: people want copy-paste examples or reference architectures.

Here are a few very frequently asked ones in Hyderabad 2026:

Example 1 — Static website on S3 + CloudFront (fast, cheap, HTTPS)

Monthly cost: ~₹200–1,000 (S3 storage + CloudFront requests) — almost zero egress

Example 2 — Serverless API (API Gateway + Lambda + DynamoDB)

Monthly cost: usually ₹0–2,000 (free tier covers most)

3. Interpretation #3 — Exam-Style Scenario Questions with Detailed Explanations

This is the third most common meaning — especially for Cloud Practitioner / Solutions Architect Associate exam prep.

Classic example question (Cloud Practitioner level):

A company is launching a new mobile app that allows users to upload photos and videos. The app needs to store the media files securely and serve them quickly to users across India and the Middle East. The company wants to minimize operational overhead and cost.

Which of the following is the MOST appropriate solution?

A) Store files in Amazon EBS volumes attached to EC2 instances B) Store files in Amazon S3 and serve them directly via public URLs C) Store files in Amazon S3 and use Amazon CloudFront for distribution D) Store files in Amazon EFS and mount it to EC2 instances

Correct answer: C

Detailed explanation (why):

• A → Wrong — EBS is block storage for EC2, not designed for public media serving or global distribution
• B → Partially correct but poor — direct S3 public URLs = high egress cost + no caching + no edge acceleration
• C → Correct — S3 for durable, cheap storage + CloudFront for global low-latency delivery + caching + HTTPS + WAF protection
• D → Wrong — EFS is file storage for multiple EC2 instances, not optimized for public internet delivery

Summary Table — AWS “Examples” Cheat Sheet (2026 – India Focus)

Teacher’s final note (real talk – Hyderabad 2026):

“AWS Examples” is never just one thing — it’s the bridge between theory and real life.

The fastest way to go from “I read the docs” to “I can actually build & explain this” is:

1. Watch a good video course (Stephane Maarek, Adrian Cantrill)
2. Build the architecture in your free-tier account
3. Break it, fix it, delete it, rebuild it
4. Do 100+ practice questions (Tutorials Dojo is still king)
5. Read 5–10 real customer stories on aws.amazon.com/solutions/case-studies

Do these five things consistently and you’ll go from “confused beginner” to “confident builder” in 2–6 months.

Got it? This is the “how to stop reading and start doing AWS for real” lesson.

Next?

• Step-by-step: Build a complete serverless food delivery backend (API Gateway + Lambda + DynamoDB + S3 + Cognito)
• Deep dive: 10 most common exam traps & how to avoid them
• Or real-world cost optimization walkthrough for a ₹1 lakh/month bill?

Tell me — next whiteboard ready! 🚀🛠️