- A
Automatically replicate objects to another bucket
Why wrong: Replication is handled by S3 replication, not event notifications.
- B
Automatically delete objects after 30 days
Why wrong: Lifecycle policies handle deletion.
- C
Encrypt objects automatically with KMS
Why wrong: Encryption is configured on the bucket, not via events.
- D
Send a notification to an SQS queue when a new object is created
S3 can publish events to SQS.
- E
Trigger a Lambda function to process an image after upload
Lambda can be triggered on S3 PUT events.
Question 1,204 of 1,616
Valid Use Cases for Amazon S3 Event Notifications
This DVA-C02 practice question tests your understanding of development with aws services. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Which TWO of the following are valid use cases for Amazon S3 event notifications?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Send a notification to an SQS queue when a new object is created
Option D is correct because Amazon S3 event notifications can be configured to publish events to an SQS queue when a new object is created (s3:ObjectCreated:*). This allows decoupled, asynchronous processing of object creation events without polling, making it ideal for workflows like log aggregation or data ingestion pipelines.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Automatically replicate objects to another bucket
Why it's wrong here
Replication is handled by S3 replication, not event notifications.
- ✗
Automatically delete objects after 30 days
Why it's wrong here
Lifecycle policies handle deletion.
- ✗
Encrypt objects automatically with KMS
Why it's wrong here
Encryption is configured on the bucket, not via events.
- ✓
Send a notification to an SQS queue when a new object is created
Why this is correct
S3 can publish events to SQS.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Trigger a Lambda function to process an image after upload
Why this is correct
Lambda can be triggered on S3 PUT events.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse S3 event notifications with S3 lifecycle policies or replication features, mistakenly thinking notifications can directly perform actions like deletion or replication, when in fact they only trigger notifications to specified destinations.
Detailed technical explanation
How to think about this question
Under the hood, S3 event notifications rely on a notification configuration attached to a bucket, which sends JSON event records to destinations such as SQS, SNS, or Lambda via the S3 API. A subtle behavior is that notifications are typically delivered within seconds but are not guaranteed to be exactly-once; duplicate events can occur, so consumers should be idempotent. In a real-world scenario, a media processing pipeline might use S3 event notifications to trigger a Lambda function for image resizing, while simultaneously sending a notification to an SQS queue for audit logging.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Send a notification to an SQS queue when a new object is created — Option D is correct because Amazon S3 event notifications can be configured to publish events to an SQS queue when a new object is created (s3:ObjectCreated:*). This allows decoupled, asynchronous processing of object creation events without polling, making it ideal for workflows like log aggregation or data ingestion pipelines.
What should I do if I get this DVA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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