AWS Patterns Best practices for AWS cloud infrastructure design and implementation. Core Services Patterns Lambda Functions S3 Bucket Configuration VPC Design IAM Best Practices Least Privilege Policy Service Role Pattern Cost Optimization Resource Tagging Strategy Spot Instances for Non-Critical Workloads High Availability Patterns Multi-AZ Deployment - Deploy across minimum 2 AZs, prefer 3 - Use Auto Scaling Groups with AZ-aware placement - Configure cross-AZ load balancing - Enable Multi-AZ for RDS and ElastiCache Circuit Breaker with Step Functions Security Patterns Secrets Manager Integr…