← DVA-C02·Amazon Web Services

Question 179 of 1,616

Deployment →hardMultiple ChoiceObjective-mapped

DVA-C02 Deployment Practice Question

This DVA-C02 practice question tests your understanding of deployment. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 company is using AWS CodeDeploy to deploy a web application to an Auto Scaling group. The deployment fails with the error: 'The overall deployment failed because too many individual instances failed deployment, too few healthy instances are available, or some instances in your deployment group are experiencing problems.' The application is deployed to a t2.micro instance with 1 GB of RAM. The deployment uses an in-place update with a deployment configuration that has a minimum of 1 healthy host. What is the most likely cause of the failure?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.

A
The application uses too much memory, causing the instance to become unhealthy during deployment.
t2.micro has only 1 GB RAM; high memory usage can cause health checks to fail.
B
The instance does not have enough disk space to download the application revision.
Why wrong: t2.micro typically has 8 GB EBS, which is usually sufficient for small applications.
C
The CodeDeploy agent timed out because the deployment took longer than 30 minutes.
Why wrong: The error does not indicate a timeout; it indicates health check failures.
D
The IAM role for the CodeDeploy agent does not have sufficient permissions to deploy the application.
Why wrong: This would result in a permission error, not a health check failure.

Full breakdown with real-world context →

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

✓

The application uses too much memory, causing the instance to become unhealthy during deployment.

The most likely cause is option A: the application uses too much memory, causing the instance to become unhealthy during deployment. The t2.micro instance has only 1 GB of RAM. If the web application consumes significant memory, deploying a new version can trigger out-of-memory (OOM) errors, leading the instance to fail health checks. The deployment configuration requires a minimum of 1 healthy host, so when the instance becomes unhealthy, the deployment fails with the error about too few healthy instances. Option B (insufficient disk space) is unlikely because t2.micro instances typically have at least 8 GB of EBS storage, which is usually sufficient for downloading application revisions. Option C (CodeDeploy agent timeout) would produce a different error, such as 'deployment timed out,' not a message about healthy instances. Option D (insufficient IAM permissions) would result in authorization failures, such as 'AccessDenied' errors, not a health-related failure. Therefore, memory exhaustion due to the small instance size is the best explanation.

Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
The application uses too much memory, causing the instance to become unhealthy during deployment.
Why this is correct
t2.micro has only 1 GB RAM; high memory usage can cause health checks to fail.
Clue confirmation
The clue words "most likely", "minimum / minimize" in the question point toward this answer.
Related concept
Authentication checks who the user is.
✗
The instance does not have enough disk space to download the application revision.
Why it's wrong here
t2.micro typically has 8 GB EBS, which is usually sufficient for small applications.
✗
The CodeDeploy agent timed out because the deployment took longer than 30 minutes.
Why it's wrong here
The error does not indicate a timeout; it indicates health check failures.
✗
The IAM role for the CodeDeploy agent does not have sufficient permissions to deploy the application.
Why it's wrong here
This would result in a permission error, not a health check failure.

Common exam traps

Common exam trap: authentication is not authorization

Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.

Detailed technical explanation

How to think about this question

This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.

KKey Concepts to Remember

Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.

TExam Day Tips

Do not assume successful login means full administrative access.
Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
Separate login problems from permission problems before choosing the answer.

Key takeaway

Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.

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

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

What to study next

Got this wrong? Here's your next step.

Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related DVA-C02 questions on access control and AAA configuration.

Related DVA-C02 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

Development with AWS Services practice questions

Practise DVA-C02 questions linked to Development with AWS Services.

Security practice questions

Practise DVA-C02 questions linked to Security.

Deployment practice questions

Practise DVA-C02 questions linked to Deployment.

Troubleshooting and Optimization practice questions

Practise DVA-C02 questions linked to Troubleshooting and Optimization.

DVA-C02 fundamentals practice questions

Practise DVA-C02 questions linked to DVA-C02 fundamentals.

DVA-C02 scenario practice questions

Practise DVA-C02 questions linked to DVA-C02 scenario.

DVA-C02 troubleshooting practice questions

Practise DVA-C02 questions linked to DVA-C02 troubleshooting.

Practice this exam

Start a free DVA-C02 practice session

Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.

10 questions 20 questions 30 questions 50 questions Timed 30

DVA-C02 practice-test guide →Study guide →Browse all practice tests

FAQ

Questions learners often ask

What does this DVA-C02 question test?

Deployment — This question tests Deployment — Authentication checks who the user is..

What is the correct answer to this question?

The correct answer is: The application uses too much memory, causing the instance to become unhealthy during deployment. — The most likely cause is option A: the application uses too much memory, causing the instance to become unhealthy during deployment. The t2.micro instance has only 1 GB of RAM. If the web application consumes significant memory, deploying a new version can trigger out-of-memory (OOM) errors, leading the instance to fail health checks. The deployment configuration requires a minimum of 1 healthy host, so when the instance becomes unhealthy, the deployment fails with the error about too few healthy instances. Option B (insufficient disk space) is unlikely because t2.micro instances typically have at least 8 GB of EBS storage, which is usually sufficient for downloading application revisions. Option C (CodeDeploy agent timeout) would produce a different error, such as 'deployment timed out,' not a message about healthy instances. Option D (insufficient IAM permissions) would result in authorization failures, such as 'AccessDenied' errors, not a health-related failure. Therefore, memory exhaustion due to the small instance size is the best explanation.

What should I do if I get this DVA-C02 question wrong?

Are there clue words in this question I should notice?

Yes — watch for: "most likely", "minimum / minimize". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

What is the key concept behind this question?

Authentication checks who the user is.

About these practice questions

Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →

How Courseiva writes practice questions · Editorial policy

Keep practising

Question Discussion

Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.

Loading comments…

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.