The answer is to use S3 Lifecycle policies to transition data to S3 Glacier Deep Archive for long-term retention, combined with S3 Intelligent-Tiering for infrequently accessed data with unknown patterns. This trio optimizes costs by automating data movement to the cheapest storage classes based on age and access, directly addressing the 7-year retention requirement and 2 TB monthly growth. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this scenario tests your ability to balance lifecycle automation with cost-effective archival—a common trap is choosing S3 Standard for long-term retention or requiring rapid retrieval (minutes) for archival data, which undermines savings. Remember the memory tip: "Archive deep, tier smart, lifecycle does the part"—S3 Glacier Deep Archive for cold data, S3 Intelligent-Tiering for unpredictable access, and Lifecycle policies to glue it all together without manual intervention.
SOA-C02 Cost and Performance Optimization Practice Question
This SOA-C02 practice question tests your understanding of cost and performance optimization. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company uses Amazon S3 to store backups and logs. The total data volume is 50 TB and grows by 2 TB per month. The company requires that data be retained for 7 years. Which THREE actions will optimize storage costs? (Choose THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use S3 Lifecycle policies to transition data to S3 Glacier Deep Archive after 30 days.
The correct answers are A, C, and D. S3 Lifecycle policies automatically transition objects to cheaper storage classes. S3 Glacier Deep Archive is the lowest-cost storage for long-term retention. S3 Intelligent-Tiering automatically moves data between tiers based on access patterns. Option B is wrong because S3 Standard is expensive for long-term retention. Option E is wrong because requiring retrieval in minutes is not cost-effective for archival data.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Use S3 Lifecycle policies to transition data to S3 Glacier Deep Archive after 30 days.
Why this is correct
Glacier Deep Archive is the cheapest for long-term retention.
Related concept
Static NAT maps one inside address to one outside address.
✓
Set up S3 Lifecycle to expire incomplete multipart uploads after 7 days.
Why this is correct
This prevents storage costs from incomplete uploads.
Related concept
Static NAT maps one inside address to one outside address.
✗
Store all data in S3 Standard for the first year, then delete.
Why it's wrong here
Deleting violates retention requirement; S3 Standard is expensive.
✓
Use S3 Intelligent-Tiering for data that is accessed infrequently but with unknown patterns.
Static NAT maps one inside address to one outside address.
✗
Use S3 Glacier Flexible Retrieval to allow data retrieval in minutes.
Why it's wrong here
Glacier Deep Archive is cheaper; retrieval time is not a priority for backups/logs.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SOA-C02 NAT questions on configuration and troubleshooting.
Cost and Performance Optimization — This question tests Cost and Performance Optimization — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use S3 Lifecycle policies to transition data to S3 Glacier Deep Archive after 30 days. — The correct answers are A, C, and D. S3 Lifecycle policies automatically transition objects to cheaper storage classes. S3 Glacier Deep Archive is the lowest-cost storage for long-term retention. S3 Intelligent-Tiering automatically moves data between tiers based on access patterns. Option B is wrong because S3 Standard is expensive for long-term retention. Option E is wrong because requiring retrieval in minutes is not cost-effective for archival data.
What should I do if I get this SOA-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SOA-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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