CV0-004 Deployment Practice Question
A cloud engineer needs to deploy a Lambda function that processes objects uploaded to an S3 bucket. The function code is stored in a .zip file. Which event trigger should the engineer configure to invoke the function automatically?
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 notification
S3 can send event notifications to Lambda when objects are created, making it the appropriate trigger for this use case.
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 event notification
Why this is correct
S3 events can trigger Lambda directly on object creation.
- ✗
API Gateway
Why it's wrong here
API Gateway is for HTTP triggers, not direct S3 events.
- ✗
SQS
Why it's wrong here
SQS is a message queue; S3 would need to send events to SQS, not directly to Lambda.
- ✗
EventBridge
Why it's wrong here
EventBridge can trigger Lambda from S3 but requires additional setup; S3 event notification is more direct.
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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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 practice question is part of Courseiva's free CompTIA 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 CV0-004 exam.