- A
Use provisioned concurrency for predictable low latency
Correct for the stated requirement.
- B
Move all logs to S3 Glacier
Why wrong: This does not meet the stated requirement as directly as the correct option.
- C
Reduce deployment package size and initialize clients outside unnecessary hot paths
Correct for the stated requirement.
- D
Disable all retries
Why wrong: This does not meet the stated requirement as directly as the correct option.
Question 662 of 1,616
DVA-C02 Troubleshooting and Optimization Practice Question
This DVA-C02 practice question tests your understanding of troubleshooting and optimization. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A Lambda function behind API Gateway intermittently times out only during cold starts. Which two actions can reduce cold-start impact?
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
✓
Use provisioned concurrency for predictable low latency
Provisioned concurrency keeps a specified number of Lambda execution environments initialized and ready to respond immediately, eliminating the cold-start latency for those invocations. This is the most direct way to ensure predictable low latency for a function that intermittently times out during cold starts.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use provisioned concurrency for predictable low latency
Why this is correct
Correct for the stated requirement.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Move all logs to S3 Glacier
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
- ✓
Reduce deployment package size and initialize clients outside unnecessary hot paths
Why this is correct
Correct for the stated requirement.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Disable all retries
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse reducing cold-start impact with optimizing log storage or retry behavior, but only provisioned concurrency and minimizing initialization code directly address the cold-start latency issue.
Detailed technical explanation
How to think about this question
Cold starts occur when Lambda needs to initialize a new execution environment, which includes downloading the deployment package, starting the runtime, and running initialization code outside the handler. Provisioned concurrency pre-warms environments by keeping them initialized, but it incurs additional cost for the reserved capacity. The trade-off is between latency predictability and cost, making it ideal for latency-sensitive APIs.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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 |
What to study next
Got this wrong? Here's your next step.
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Troubleshooting and Optimization — study guide chapter
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Troubleshooting and Optimization — This question tests Troubleshooting and Optimization — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use provisioned concurrency for predictable low latency — Provisioned concurrency keeps a specified number of Lambda execution environments initialized and ready to respond immediately, eliminating the cold-start latency for those invocations. This is the most direct way to ensure predictable low latency for a function that intermittently times out during cold starts.
What should I do if I get this DVA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This DVA-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 DVA-C02 exam.
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