CV0-004 Deployment Practice Question
A cloud engineer is deploying a Lambda function that processes events from an SQS queue. The function must be able to handle a burst of up to 1000 concurrent invocations. Which configuration should the engineer set to ensure the function can scale to meet this demand?
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
✓
Set the function's reserved concurrency to 1000
Lambda scales by increasing concurrency. The reserved concurrency sets a limit; burst concurrency is a regional limit. To handle 1000 concurrent, set reserved concurrency to at least 1000. Unreserved account concurrency is shared.
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's reserved concurrency to 1000
Why this is correct
Reserved concurrency guarantees capacity.
- ✗
Enable provisioned concurrency for the function
Why it's wrong here
Provisioned concurrency pre-warms but not required for scaling.
- ✗
Configure SQS to batch messages in groups of 100
Why it's wrong here
Batching reduces invocations, not concurrency.
- ✗
Set the function's unreserved account concurrency to 1000
Why it's wrong here
Unreserved is shared across functions.
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.