convert the texts to Wallpaper, 1080p resolution for laptop screen π 1. Core AWS Services (Know These Cold) These are the foundation of most AWS architectures: EC2 β Virtual servers in the cloud. Understand instance types, pricing models (on-demand, reserved, spot), and auto-scaling. S3 β Object storage. Learn about storage classes, lifecycle policies, and bucket policies. RDS vs DynamoDB β Relational vs NoSQL databases. VPC β Virtual Private Cloud. Learn subnets, route tables, NAT Gateway vs Internet Gateway. Lambda β Serverless compute. Know when to use it over EC2. ELB β Load balancers (ALB vs NLB basics). IAM β Identity and Access Management: policies, roles, least privilege. π 2. Security and Identity (Always Important in AWS) IAM: Users, Roles, Groups, and Policies (JSON) MFA (Multi-Factor Authentication) KMS (Key Management Service) Shared Responsibility Model Security Groups vs NACLs π 3. Design Principles (From the AWS Well-Architected Framework) These appear in many questions: Scalability: Use auto-scaling, S3, RDS read replicas, etc. High Availability & Fault Tolerance: Multi-AZ, multi-region, ELB. Performance Efficiency: Right service for the right workload. Cost Optimization: Spot instances, Reserved instances, S3 lifecycle policies. Operational Excellence: Monitoring (CloudWatch), logging (CloudTrail). π§ 4. Hands-On Use Cases Expect scenario-based questions. Know how to: Set up a highly available web app (ELB + Auto Scaling + EC2 + RDS Multi-AZ) Migrate on-premises workloads (Snowball, AWS Migration tools) Secure an app (IAM + VPC + S3 bucket policies) Store and retrieve large files (S3 + Glacier) π 5. Monitoring and Logging CloudWatch β metrics and alarms CloudTrail β API call logging Config β track resource config changes
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