A media company serves large video files to global users with minimal origin load. Which combination is MOST appropriate?

• Single EC2 instance in one AZ with EBS st1 volume
• S3 bucket as origin with CloudFront distribution
• EFS mounted on EC2 in every Region manually
• RDS Multi-AZ for video object storage

An OLTP application on RDS MySQL has heavy read traffic for reporting dashboards while writes stay moderate. What is the BEST first step?

• Enable Multi-AZ on the primary only
• Add RDS read replicas and route report queries to them
• Migrate immediately to DynamoDB
• Store reports in S3 Glacier

A serverless API backed by DynamoDB needs microsecond read latency for the same keys repeatedly. Which service should you add?

• Amazon ElastiCache Memcached
• DynamoDB Accelerator (DAX)
• Amazon Redshift
• AWS Storage Gateway

Which EC2 volume type is BEST for a production database requiring sustained high IOPS on a single attached instance?

• sc1
• gp3 with provisioned IOPS if needed, or io2 for highest SLA
• st1
• Standard S3 bucket mounted via FUSE

Users worldwide need low-latency access to a TCP-based custom protocol application in two AWS Regions with automatic failover. What should you use?

• CloudFront with Lambda@Edge only
• AWS Global Accelerator with endpoint groups in both Regions
• S3 Transfer Acceleration
• Route 53 simple routing to a single IP