CV0-004 Deployment Practice Question
A developer is deploying a serverless application using AWS Lambda. They want to reuse common code (e.g., database connection logic) across multiple functions without duplicating it. Which Lambda feature should they use?
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
✓
Lambda layers
Lambda Layers allow you to package and share code across multiple functions, enabling code reuse and reducing deployment package size.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Lambda versions
Why it's wrong here
Versions are for managing published states of a function, not for sharing code across functions.
- ✗
Lambda aliases
Why it's wrong here
Aliases point to specific versions, not for code reuse.
- ✓
Lambda layers
Why this is correct
Layers are used to centrally manage code and data shared across multiple functions.
- ✗
Lambda environment variables
Why it's wrong here
Environment variables store configuration settings, not reusable code.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
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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.