10 questions · 130 min · Pass 720
A company has an API that receives requests in bursts—thousands per minute during business hours, near zero at night. Currently running on EC2 24/7. How can costs be reduced without impacting performance?
A company stores log files in S3 Standard. Logs are accessed frequently for 30 days, occasionally for 90 days, then rarely but must be retained for 7 years for compliance. Which S3 lifecycle configuration minimizes cost?
A company's monthly AWS bill shows high NAT Gateway data processing charges from instances in private subnets accessing S3 frequently. How should the architect reduce these costs?
A company stores data in S3 but cannot predict access patterns. Some objects are accessed daily while others go months without access. Which storage class automatically optimizes cost without retrieval fees?
A company notices its EC2 costs are higher than expected. Many instances show average CPU utilization below 10%. Which AWS tool helps identify and recommend right-sizing opportunities?
A data analytics team runs nightly batch jobs that take 2-4 hours and can tolerate interruptions. Which EC2 pricing model minimizes cost?
A company runs production EC2 instances 24/7 with predictable, steady-state compute requirements for the next 3 years. Which purchasing option provides the greatest cost savings?
A company wants to reduce EC2 compute costs for its Linux-based web application without changing instance families or purchasing commitments. Which approach offers immediate savings?
A company wants to commit to a consistent amount of compute usage per hour for 1 or 3 years in exchange for lower prices, but needs flexibility to change instance types. Which pricing model fits?
An application in us-east-1 transfers 10 TB of data monthly to a replica in eu-west-1 over the internet. The architect wants to reduce cross-region data transfer costs. Which approach is most effective?
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