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Example AWS flashcards
What is the primary purpose of AWS IAM?
IAM (Identity and Access Management) manages user identities, authentication, and authorization to AWS resources through policies, roles, and permissions.
What's the difference between an IAM User and an IAM Role?
IAM Users have long-term credentials (access keys/password) and are for people/applications. IAM Roles have temporary credentials and are assumed by users, services, or federated identities.
What command lists all S3 buckets in your AWS account?
aws s3 ls
What is the most common pattern for granting EC2 instances access to S3?
Attach an IAM Role to the EC2 instance that includes an S3 access policy. This avoids storing AWS credentials on the instance.
What command uploads a file to an S3 bucket using the AWS CLI?
aws s3 cp <local_file> s3://<bucket_name>/<key>
What is the purpose of Security Groups in EC2?
Security Groups act as stateful firewalls controlling inbound and outbound traffic to EC2 instances by IP protocol, port, and source/destination.
What AWS service provides managed relational databases with automatic backups and failover?
Amazon RDS (Relational Database Service). Supports MySQL, PostgreSQL, MariaDB, Oracle, and SQL Server.
What is the purpose of CloudWatch in AWS?
CloudWatch collects and monitors metrics, logs, and events from AWS resources; enables alarms and dashboards for observability.
What command retrieves the last 50 lines of EC2 instance logs using AWS CLI?
aws ec2 describe-instances --instance-ids <instance-id> or use aws ssm start-session to connect and view logs directly.
What is infrastructure-as-code (IaC) in AWS and what are two common tools?
IaC defines AWS infrastructure in code/templates for reproducibility. CloudFormation (AWS native) and Terraform (multi-cloud) are the two most common tools.
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