Architecting on AWS Certification Architecting on AWS Certification High Availability & Fault Tolerance 1

Question 1

Which AWS service enables you to distribute incoming application traffic across multiple targets, such as EC2 instances, in multiple Availability Zones?

Accepted Answer

Elastic Load Balancing

Answer

Elastic Load Balancing automatically distributes incoming traffic across multiple targets in one or more Availability Zones to increase fault tolerance.

Question 2

What is the minimum number of Availability Zones recommended when designing a highly available architecture on AWS?

Accepted Answer

2

Answer

AWS recommends deploying across at least 2 Availability Zones so that if one AZ fails, the application continues running in the other.

Question 3

Which Amazon RDS feature automatically creates a standby replica in a different Availability Zone and promotes it if the primary fails?

Accepted Answer

Multi-AZ deployment

Answer

RDS Multi-AZ maintains a synchronous standby replica in a different AZ and automatically fails over to it during outages.

Question 4

An architect wants an S3-based static website to withstand the failure of an entire AWS Region. Which feature should be configured?

Accepted Answer

S3 Cross-Region Replication

Answer

S3 Cross-Region Replication asynchronously copies objects to a bucket in another Region, enabling region-level fault tolerance.

Question 5

Which Route 53 routing policy sends traffic to the healthiest endpoint and can automatically failover when a primary endpoint becomes unhealthy?

Accepted Answer

Failover routing

Answer

Route 53 Failover routing directs traffic to a primary resource and automatically routes to a secondary resource when health checks detect a failure.

Architecting on AWS Certification Practice Test

Architecting on AWS Certification Practice Test

Architecting on AWS Certification Architecting on AWS Certification High Availability & Fault Tolerance 1