CV0-004 Deployment Practice Question
A cloud engineer is deploying a serverless function using AWS Lambda. The function needs to process messages from an SQS queue. Which event source should be configured to trigger the Lambda function?
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
✓
Amazon SQS
Lambda can be triggered by SQS, S3, API Gateway, etc. For SQS, the trigger is SQS. S3 triggers on object events; API Gateway for HTTP; EventBridge for events.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon S3
Why it's wrong here
S3 triggers on bucket events, not SQS.
- ✓
Amazon SQS
Why this is correct
Lambda can poll SQS queue and process messages.
- ✗
Amazon API Gateway
Why it's wrong here
API Gateway triggers Lambda via HTTP requests.
- ✗
Amazon EventBridge
Why it's wrong here
EventBridge triggers Lambda based on event patterns.
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
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