A Company Has Amazon EC2 Instances That Serve Web Content

question 709

Multiple Choice

A company has Amazon EC2 instances that serve web content behind an Elastic Load Balancing (ELB) load balancer. The ELB Amazon CloudWatch metrics from a few hours ago indicate a significant number of 4XX errors. The EC2 instances from the time of these errors have been deleted. At the time of the 4XX errors, how can an Administrator obtain information about who originated these requests?

• A) If ELB access logs have been enabled, the information can be retrieved from the S3 bucket
• B) Contact AWS Support to obtain application logs from the deleted instances
• C) Amazon S3 always keeps a backup of application logs from EC2 instances. Retrieve these logs for analysis
• D) Use AWS Trusted Advisor to obtain ELB access logs

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Definitions:

Success Rate

The percentage of attempts or operations that are successful, often used as a measure of efficiency or effectiveness.

MTBF

Mean Time Between Failures, a reliability term used to predict the time elapsed between inherent failures of a system during operation.

Operating Time

The total amount of time during which a machine, system, or facility is functioning and available for use.

Oil Change

A routine maintenance operation for vehicles involving the removal of old engine oil and replacing it with new oil to ensure proper engine lubrication and performance.