The correct answer is to enable S3 Object Lock in Compliance mode on the destination bucket. This works because Compliance mode prevents any user, including the AWS root user, from deleting or overwriting objects for the specified retention period, making it the only option that guarantees true immutability for your 7-year immutable CloudTrail log retention requirement. On the AWS Certified Security Specialty SCS-C02 exam, this question tests your understanding of the critical difference between Compliance and Governance modes—a common trap is confusing MFA Delete or Glacier Deep Archive with immutability, but MFA Delete can still be bypassed by root, and storage classes alone do not enforce write-once-read-many (WORM) protection. Remember that for regulatory compliance where no one can override retention, you must lock it down with Compliance mode, not Governance. A helpful memory tip: “Compliance is court-proof; Governance is just a gate.”
SCS-C02 Security Logging and Monitoring Practice Question
This SCS-C02 practice question tests your understanding of security logging and monitoring. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 has a requirement to retain CloudTrail logs for 7 years to meet regulatory compliance. They want to minimize storage costs while ensuring logs are immutable and cannot be deleted by anyone, including the root user. What should they do?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable S3 Object Lock in Compliance mode on the destination bucket.
S3 Object Lock with Compliance mode ensures that objects cannot be deleted or overwritten by any user, including the root user, for the specified retention period. Governance mode allows some users to override. Option A is wrong because MFA Delete does not prevent deletion by root. Option C is wrong because S3 Glacier Deep Archive is a storage class, not immutability. Option D is wrong because CloudTrail does not provide immutability.
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.
✗
Configure the S3 bucket with MFA Delete enabled.
Why it's wrong here
MFA Delete requires multi-factor authentication for delete operations but can be bypassed by root.
✗
Use CloudTrail log file validation and enable AWS CloudTrail Insights.
Why it's wrong here
Log file validation ensures integrity but does not prevent deletion.
✗
Store the logs in Amazon S3 Glacier Deep Archive with a vault lock policy.
Why it's wrong here
Glacier Deep Archive is a storage class; vault lock policies are for Glacier vaults, not S3.
✓
Enable S3 Object Lock in Compliance mode on the destination bucket.
Why this is correct
Compliance mode prevents any user from deleting objects until the retention period expires.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
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 SCS-C02 NAT questions on configuration and troubleshooting.
Security Logging and Monitoring — This question tests Security Logging and Monitoring — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Enable S3 Object Lock in Compliance mode on the destination bucket. — S3 Object Lock with Compliance mode ensures that objects cannot be deleted or overwritten by any user, including the root user, for the specified retention period. Governance mode allows some users to override. Option A is wrong because MFA Delete does not prevent deletion by root. Option C is wrong because S3 Glacier Deep Archive is a storage class, not immutability. Option D is wrong because CloudTrail does not provide immutability.
What should I do if I get this SCS-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 SCS-C02 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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