AWS Certified SysOps Administrator – Associate (legacy) — Question 551

An Application Load Balancer (ALB) is configured in front of Amazon EC2 instances. The current target group health check configuration is:
✑ Interval: 30 seconds
✑ Unhealthy threshold: 10
✑ Healthy threshold: 5
Which steps should a SysOps Administrator take to reduce the amount of time needed to remove unhealthy instances? (Choose two.)

Answer options

• A. Change the healthy threshold configuration to 1.
• B. Change the interval configuration to 15.
• C. Change the interval configuration to 60.
• D. Change the unhealthy threshold configuration to 15.
• E. Change the unhealthy threshold configuration to 5.

Correct answer: B, E

Explanation

To speed up the removal of failing targets, the administrator must reduce the total time required to declare an instance unhealthy, which is calculated by multiplying the health check interval by the unhealthy threshold. Decreasing the interval to 15 seconds (Option B) and lowering the unhealthy threshold to 5 (Option E) will both shorten this detection window. Adjusting the healthy threshold (Option A) has no effect on how quickly unhealthy instances are detected.