CV0-004 Deployment Practice Question
A company wants to deploy a Lambda function that processes objects uploaded to an S3 bucket. Which event trigger should be configured on the Lambda function?
⚠ Common exam trap
CompTIA Cloud+ often tests the misconception that SQS or CloudWatch Events are required to bridge S3 and Lambda, when in fact S3 can invoke Lambda directly via its event notification feature.
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 bucket event notification
S3 bucket event notifications can be configured to directly invoke a Lambda function when objects are uploaded. This is the native, serverless integration where S3 publishes an event (e.g., s3:ObjectCreated:Put) to Lambda, triggering the function automatically without any intermediary service.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
API Gateway
Why it's wrong here
API Gateway exposes HTTP endpoints, not S3 events.
- ✗
CloudWatch Events
Why it's wrong here
CloudWatch Events can schedule Lambda but not respond to S3 object uploads directly.
- ✓
S3 bucket event notification
Why this is correct
S3 can publish events to Lambda when objects are uploaded.
- ✗
SQS
Why it's wrong here
SQS is a queue service; S3 can send to SQS but not directly trigger Lambda.
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
Related to this question
About these practice questions
This CV0-004 question is part of Courseiva's 977-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.