Architecting on AWS Certification Architecting on AWS Certification Cost Optimization & Performance Efficiency

Question 1

Which EC2 purchasing option offers up to 90% discount compared to On-Demand pricing in exchange for a flexible one- or three-year commitment to a specific instance family and Region?

Accepted Answer

Compute Savings Plans

Answer

Spot Instances

Answer

Reserved Instances

Answer

Dedicated Hosts

Question 2

Which S3 storage class is the most cost-effective for data that is accessed infrequently but must be retrieved within milliseconds?

Accepted Answer

S3 Standard-Infrequent Access

Answer

S3 Standard

Answer

S3 Glacier Instant Retrieval

Answer

S3 One Zone-IA

Question 3

An architect wants to right-size EC2 instances based on historical CPU and memory utilization. Which AWS service provides these recommendations?

Accepted Answer

AWS Compute Optimizer

Answer

AWS Trusted Advisor

Answer

AWS Cost Explorer

Answer

Amazon Inspector

Question 4

Which caching strategy reduces database read load by storing frequently queried results in memory, improving application throughput and reducing cost?

Accepted Answer

All of the above are valid strategies

Answer

Write-through caching with ElastiCache

Answer

Read-through caching with ElastiCache

Answer

Lazy-loading caching with ElastiCache

Question 5

An application serves static assets globally. Which AWS service reduces latency for users worldwide by caching content at edge locations?

Accepted Answer

Amazon CloudFront

Answer

AWS Global Accelerator

Answer

Elastic Load Balancing

Answer

Amazon API Gateway

Question 6

Which EC2 instance purchasing model is best suited for a batch processing workload that can tolerate interruptions in exchange for the lowest possible cost?

Accepted Answer

Spot Instances

Answer

On-Demand Instances

Answer

Reserved Instances

Answer

Dedicated Instances