DevOps Engineering on AWS Certification High Availability, Fault Tolerance, and Auto Scaling

Question 1

Which AWS Auto Scaling policy adjusts capacity based on a target value for a specific metric, such as 70% CPU utilization?

Accepted Answer

Target Tracking Scaling

Answer

Target Tracking Scaling automatically adjusts the number of instances to keep a chosen metric, like CPU utilization, at or near a specified target value.

Question 2

What is the purpose of an EC2 Auto Scaling lifecycle hook?

Accepted Answer

To pause instance launch or termination so custom actions can be performed

Answer

Lifecycle hooks put instances in a wait state during launch or termination, allowing time to run scripts, drain connections, or register/deregister from services.

Question 3

Which AWS service provides managed service discovery for microservices running on ECS or EC2?

Accepted Answer

AWS Cloud Map

Answer

AWS Cloud Map allows you to register application resources and define custom names, enabling services to discover each other dynamically.

Question 4

Which ELB type is optimized for handling millions of requests per second with ultra-low latency at the TCP layer?

Accepted Answer

Network Load Balancer

Answer

Network Load Balancer operates at Layer 4 and is designed for extreme performance, handling millions of requests per second with very low latency.

Question 5

What does an EC2 Auto Scaling warm pool enable?

Accepted Answer

Pre-initialized instances that can be quickly launched to handle demand spikes

Answer

A warm pool maintains a pool of pre-initialized EC2 instances that have completed their bootstrap process, enabling faster scale-out response times.

DevOps Engineering on AWS Certification Practice Test

DevOps Engineering on AWS Certification Practice Test

DevOps Engineering on AWS Certification High Availability, Fault Tolerance, and Auto Scaling