DOP-C02 Incident and Event Response Practice Question
This DOP-C02 practice question tests your understanding of incident and event response. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 hosts a static website on Amazon S3 with CloudFront as the CDN. Users report that they see an old version of the website even after the DevOps team updated the S3 objects. The team verified that the new objects are in the S3 bucket and are publicly accessible. The CloudFront distribution has a default TTL of 24 hours. To immediately serve the new content to users, the team needs to invalidate the CloudFront cache. Which of the following is the CORRECT approach to achieve this with minimal impact?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a CloudFront invalidation request for the path '/*'.
Option D is correct because creating a CloudFront invalidation for the path '/*' will remove all cached objects and force CloudFront to fetch new content from S3. Option A is wrong because changing the origin path does not invalidate cache. Option B is wrong because updating TTL affects future caching, not existing cache. Option C is wrong because S3 does not control CloudFront cache.
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.
✓
Create a CloudFront invalidation request for the path '/*'.
Why this is correct
Invalidation removes cached objects immediately.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Change the CloudFront origin path to point to a new S3 bucket.
Why it's wrong here
Does not invalidate existing cache; requires DNS propagation.
✗
Update the CloudFront distribution's default TTL to 0 and wait for the changes to propagate.
Why it's wrong here
TTL changes do not immediately purge cached objects.
✗
Delete the S3 objects and re-upload them with different names.
Why it's wrong here
Does not affect CloudFront cache; old objects remain cached.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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 DOP-C02 NAT questions on configuration and troubleshooting.
Incident and Event Response — This question tests Incident and Event Response — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Create a CloudFront invalidation request for the path '/*'. — Option D is correct because creating a CloudFront invalidation for the path '/*' will remove all cached objects and force CloudFront to fetch new content from S3. Option A is wrong because changing the origin path does not invalidate cache. Option B is wrong because updating TTL affects future caching, not existing cache. Option C is wrong because S3 does not control CloudFront cache.
What should I do if I get this DOP-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 DOP-C02 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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