What is a target group in Elastic Load Balancing?

A target group is a set of registered targets (like EC2 instances) that an Elastic Load Balancer routes traffic to.

What is the default load-balancing algorithm used by Application Load Balancer?

The default load-balancing algorithm for an Application Load Balancer is round-robin.

Does a cloud watch go into WARNING state before triggering alarm?

No, CloudWatch alarms transition directly to ALARM when thresholds are breached; there is no WARNING state.

Is FTP protocol supported by SNS for subscription endpoints?

No, the FTP protocol is not supported by Amazon SNS for subscription endpoints.

What is the typical use case for an SNS Dead Letter Queue (DLQ)?

An SNS Dead Letter Queue (DLQ) is used to store messages that couldn’t be successfully delivered to their subscribed endpoints for later analysis or reprocessing.