Arch::08::HA

What method of automatic elasticity IS NOT available in AWS?

• Time-based
• Volume-based
• Predictive-based
• Quiromantic-based

What is NOT the role of Cloudwatch in an elastic architecture?

• Collect and process logs
• Trigger reactions to events
• Aggregate metrics
• Apply security rules

What service can be used to audit AWS API calls?

• Cloudformation
• Cloudwatch
• CloudTrail
• Config

What is the purpose of VPC Flow logs?

• Reflect traffic generated in your VPC
• Provide a way to intercept filtered VPC traffic for analysing
• Enforce route paths in your VPCs
• Detect security group missconfigurations

What is the best way to react when a new instance is created by an ASG?

• Executing a lambda every min to describe the instances and detect when a new one is being created
• Using ASG lifecycle hooks
• Adding a cloudformation hook when the ASG is described
• Adding a https invocation in the user-data of the instance

What is NOT a valid way to increase the performance of an RDS database?

• Adding a read replica
• Adding a standby instance
• Implementing the cache-aside pattern using Elasticache
• Incrementing the provisioned IOPS

What is the best way to implement vertical autoscaling of RDS without any type of outage?

• Adding read replicas
• Using Aurora Serverless
• Changing the database size
• Incrementing the provisioned IOPS

What is the most efficient cost strategy for DynamoDB with stable workloads?

• Using fixed capacity and buy a reservation
• Using autoscaling capacity and buy a reservation according to the baseline
• Using on-demand capacity
• Using spot capacity

What is the most efficient cost strategy for DynamoDB with unpredictable workloads?

• Using fixed capacity and buy a reservation
• Using autoscaling capacity and buy a reservation according to the baseline
• Using on-demand capacity
• Using spot capacity