Architecting on AWS Certification Welding Procedures & Techniques 2

Question 1

A company needs its web application to survive the failure of an entire AWS Availability Zone. Which architecture achieves this?

Accepted Answer

Distribute EC2 instances across multiple AZs behind an ALB

Answer

Distributing instances across multiple AZs behind an ALB ensures traffic is routed to healthy AZs if one fails.

Question 2

Which AWS service provides a managed NoSQL database with built-in multi-AZ replication and single-digit millisecond latency?

Accepted Answer

Amazon DynamoDB

Answer

DynamoDB is a fully managed NoSQL service with automatic multi-AZ replication and consistent low latency.

Question 3

A solutions architect wants to decouple a producer microservice from a consumer microservice to handle burst traffic. What is the best approach?

Accepted Answer

Place an Amazon SQS queue between the producer and consumer

Answer

SQS buffers messages so the consumer can process at its own pace, decoupling the two services.

Question 4

An architect must ensure that data stored in Amazon S3 is encrypted at rest using customer-managed keys. Which option satisfies this requirement?

Accepted Answer

AWS KMS Customer Managed Keys (SSE-KMS)

Answer

SSE-KMS uses CMKs in AWS KMS, giving the customer full control over key management and auditing.

Question 5

Which AWS storage class is most cost-effective for data that is accessed once a quarter and must be retrieved within minutes?

Accepted Answer

S3 Standard-IA

Answer

S3 Standard-IA is designed for infrequently accessed data that still needs millisecond retrieval.

Architecting on AWS Certification Practice Test