AWSFundamentals Study Notes

Auto Scaling Groups

Learn how EC2 Auto Scaling Groups automatically add and remove instances based on demand, using launch templates, scaling policies, and health checks.

AWS CloudFront Basics

Understand how Amazon CloudFront's global CDN caches and accelerates content delivery, including origins, cache behaviors, and invalidation strategies.

AWS Free Tier and Billing Basics

How AWS's Free Tier works, how billing and invoicing are structured, and the tools and habits that keep costs predictable and under control.

AWS Interview Questions

Common categories of AWS interview questions, with the reasoning interviewers are actually testing for and how to structure strong answers.

AWS KMS Basics

AWS Key Management Service (KMS) creates and controls the cryptographic keys used to encrypt data across AWS services, without exposing the underlying key mate…

AWS Lambda Basics

Learn how AWS Lambda's serverless compute model works, including function packaging, triggers, execution roles, and how billing differs from EC2.

AWS Quick Reference

A condensed cheat sheet of core AWS compute, storage, networking, database, IAM, and CLI facts for fast lookup and last-minute review.

AWS Route 53 Basics

Learn how Amazon Route 53 provides scalable DNS, domain registration, and traffic routing policies like weighted, latency-based, and failover routing.

AWS Shared Responsibility Model

How security and compliance obligations are divided between AWS and its customers, and why misunderstanding this split is a leading cause of cloud security inc…

AWS Storage Gateway Overview

See how AWS Storage Gateway bridges on-premises applications to S3, EBS snapshots, and Glacier using File, Volume, and Tape gateway modes.

The AWS Well-Architected Framework

A structured overview of the six pillars AWS uses to evaluate cloud architectures, and the practical trade-offs engineers face applying them.

CloudWatch Monitoring Basics

Learn how Amazon CloudWatch collects metrics and logs from your AWS resources, and how to build alarms that alert you before small issues become outages.

Deploying a Simple App on AWS

A practical walkthrough of the main paths for getting a small web application live on AWS, from Elastic Beanstalk to static hosting with S3 and CloudFront.

DynamoDB Basics

Amazon DynamoDB is a fully managed, serverless NoSQL key-value and document database designed for single-digit-millisecond performance at any scale.

EBS vs Instance Store

Understand the difference between persistent, network-attached EBS volumes and ephemeral, physically-attached instance store volumes on EC2, and when to use ea…

EC2 Fundamentals

Learn what Amazon EC2 is, how virtual server instances work in the cloud, and how to launch, connect to, and manage them safely.

EC2 Instance Types and Pricing

Understand EC2 instance family naming, how to pick the right instance size for a workload, and the trade-offs between On-Demand, Reserved, and Spot pricing.

EFS Explained

Learn how Amazon EFS provides a fully managed, elastic NFS file system that multiple EC2 instances and containers can mount and share concurrently.

Elastic Load Balancing

Learn how AWS Elastic Load Balancing distributes traffic across healthy targets, and the differences between Application, Network, and Gateway Load Balancers.

IAM Policies Explained

IAM policies are JSON documents that define permissions, and understanding their structure and evaluation logic is essential to securing an AWS account.

IAM Users, Groups, and Roles

AWS Identity and Access Management (IAM) defines who or what can act in your account, using users, groups, and roles as the core identity building blocks.

RDS Fundamentals

Amazon RDS is a managed relational database service that automates provisioning, patching, backups, and failover for engines like MySQL, PostgreSQL, and Aurora.

S3 Fundamentals

Learn how Amazon S3 stores data as objects in buckets, and the durability, consistency, and access-control model that makes it the backbone of AWS storage.

S3 Storage Classes

Compare S3's storage classes — from Standard to Glacier Deep Archive — and learn how to pick the right one and automate transitions with lifecycle rules.