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CV0-004 Practice Question: Is deploying a serverless application using AWS…
A cloud engineer is deploying a serverless application using AWS Lambda. The application processes files uploaded to an S3 bucket. To minimize cold start latency, which deployment configuration should the engineer use?
⚠ Common exam trap
CompTIA often tests the misconception that reducing timeout or placing Lambda in a VPC improves performance, when in fact these actions either have no effect or increase latency due to network overhead.
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
✓
Increase the memory allocation and enable provisioned concurrency.
Provisioned concurrency pre-warms a specified number of Lambda execution environments, eliminating cold starts for those instances. Increasing memory allocation also proportionally increases CPU and network throughput, which can reduce initialization time. Together, these configurations directly address cold start latency for a serverless application processing S3 uploads.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Set the function timeout to the minimum value.
Why it's wrong here
Timeout does not affect cold starts.
- ✓
Increase the memory allocation and enable provisioned concurrency.
Why this is correct
More memory means faster initialization; provisioned concurrency eliminates cold starts.
- ✗
Place the Lambda function in a VPC without any NAT gateway.
Why it's wrong here
VPC often increases cold start latency due to ENI creation.
- ✗
Configure the function to run in a specific Availability Zone.
Why it's wrong here
Not a Lambda configurable option.
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.