An Application Is Running on Amazon EC2 Instances Behind a Classic

question 368

Multiple Choice

An application is running on Amazon EC2 instances behind a Classic Load Balancer. The instances run in an Auto Scaling group across multiple Availability Zones. Occasionally multiple incoming requests will receive a 5xx HTTP response when making a request to the Classic Load Balancer. From the Amazon CloudWatch metrics, a SysOps Administrator observes the Elastic Load Balancing (ELB) SpillOverCount metric to be greater than zero during these occasions. These errors can be avoided by triggering scaling actions on which ELB metric?

• A) HealthyHostCount
• B) BackendConnectionErrors
• C) SurgeQueueLength
• D) UnHealthyHostCount

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Definitions:

Accrued Interest

Interest that has been earned but not yet received or recorded in the accounts.

Note Receivable

A written promise or obligation for the payment of a certain sum of money to the holder on demand or at a specified future date.

Interest Receivable

The revenue from interest that has been earned but not yet received, recorded as an asset on the balance sheet.

Discounts Own Note

A transaction where a business discounts or reduces the value of its own promissory note, often to raise short-term capital.