SAP-C02 Design for New Solutions Practice Question
A company wants to implement a serverless architecture where an AWS Lambda function is triggered whenever a new object is uploaded to an S3 bucket. Which S3 feature should they use?
⚠ Common exam trap
A common mix-up: candidates confuse S3 Event Notifications with S3 Inventory or S3 Object Lock, thinking any S3 feature that 'tracks' or 'protects' objects can trigger code, but only Event Notifications provide real-time, push-based triggers to Lambda.
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
✓
S3 Event Notifications
S3 Event Notifications allow you to configure S3 to publish events (e.g., s3:ObjectCreated:Put) to AWS Lambda, SQS, or SNS whenever an object is uploaded. This is the native serverless integration that triggers a Lambda function directly from S3 without polling or custom code.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
S3 Object Lock
Why it's wrong here
Prevents object deletion.
- ✗
S3 Transfer Acceleration
Why it's wrong here
Accelerates uploads, does not trigger events.
- ✓
S3 Event Notifications
Why this is correct
S3 can send events to Lambda on object creation.
- ✗
S3 Inventory
Why it's wrong here
Provides inventory reports.
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 |
Go deeper
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Written by Johnson Ajibi, MSc IT Security
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This SAP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SAP-C02 exam.