SAP-C02 Continuous Improvement for Existing Solutions Practice Question
A company uses AWS Lambda functions to process events from Amazon SQS. The function's duration has increased, causing a backlog. The team wants to improve throughput without changing the function code. Which action should the team take?
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 Lambda function reserved concurrency.
Increasing the number of Lambda function instances will increase concurrency and process more messages in parallel. Option A is wrong because increasing batch size may cause timeouts. Option C is wrong because increasing function memory/timeout does not directly improve throughput. Option D is wrong because SQS visibility timeout does not affect Lambda concurrency.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the SQS visibility timeout to allow more time per message.
Why it's wrong here
Does not increase processing rate.
- ✓
Increase the Lambda function reserved concurrency.
Why this is correct
More concurrent executions allow processing more messages simultaneously.
- ✗
Increase the Lambda function memory and timeout settings.
Why it's wrong here
Improves performance per invocation but not concurrency.
- ✗
Increase the SQS batch size to the maximum of 100.
Why it's wrong here
Larger batch may cause function timeout and does not increase concurrency.
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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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SAP-C02 practice question is part of Courseiva's free Amazon Web Services 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 SAP-C02 exam.