← SOA-C02·Amazon Web Services

Question 1,447 of 1,546

Deployment, Provisioning, and Automation →easyMultiple SelectObjective-mapped

Quick Answer

The answer is to configure the environment’s Auto Scaling group with a minimum of 2 instances spread across multiple Availability Zones and enable a load balancer with health checks. This combination ensures high availability because the Auto Scaling group maintains at least two running instances in separate zones, so if one zone fails, traffic is routed to the remaining healthy instance. The load balancer distributes incoming requests across those instances, while health checks detect a failed instance and trigger Auto Scaling to automatically replace it. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this question tests your understanding that high availability requires both redundancy (multiple instances across zones) and automated recovery (Auto Scaling with health checks), not just monitoring tools like CloudWatch alarms. A common trap is confusing CloudWatch alarms with the actual replacement mechanism—alarms alert, but only Auto Scaling replaces instances. Memory tip: “Two zones, two instances, one load balancer—that’s the high availability trinity.”

SOA-C02 Deployment, Provisioning, and Automation Practice Question

This SOA-C02 practice question tests your understanding of deployment, provisioning, and automation. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 SysOps administrator is planning to deploy a web application using AWS Elastic Beanstalk. The application requires high availability across multiple Availability Zones. The administrator needs to configure the environment to automatically replace a failed instance. Which TWO configuration options should the administrator enable? (Choose TWO.)

Question 1easymulti select

Full question →

A
Enable the environment's health check and set the health check path to a valid endpoint.
Health checks allow the load balancer to detect unhealthy instances and Auto Scaling to replace them.
B
Attach an Application Load Balancer to distribute traffic to healthy instances.
Why wrong: Load balancer distributes traffic but does not replace failed instances; that is Auto Scaling's role.
C
Configure the environment's Auto Scaling group with a minimum of 2 instances spread across multiple Availability Zones.
Multiple instances across AZs provide high availability and automatic replacement.
D
Use AWS OpsWorks Stacks to manage the instance lifecycle.
Why wrong: OpsWorks is not needed; Elastic Beanstalk manages instances.
E
Create a CloudWatch alarm that triggers an SNS notification when an instance fails.
Why wrong: An alarm notifies but does not automatically replace the instance.

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

✓

Enable the environment's health check and set the health check path to a valid endpoint.

Option A (Auto Scaling group with a minimum of 2 instances) is correct for high availability. Option B (Load balancer) is correct for distributing traffic. Option D (Health check) is correct for detecting failures. Option C is incorrect because OpsWorks is a different service. Option E is incorrect because CloudWatch alarms alert but do not automatically replace instances without Auto Scaling.

Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

Answer analysis

Option-by-option breakdown

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

✓
Enable the environment's health check and set the health check path to a valid endpoint.
Why this is correct
Health checks allow the load balancer to detect unhealthy instances and Auto Scaling to replace them.
Related concept
Static NAT maps one inside address to one outside address.
✗
Attach an Application Load Balancer to distribute traffic to healthy instances.
Why it's wrong here
Load balancer distributes traffic but does not replace failed instances; that is Auto Scaling's role.
✓
Configure the environment's Auto Scaling group with a minimum of 2 instances spread across multiple Availability Zones.
Why this is correct
Multiple instances across AZs provide high availability and automatic replacement.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use AWS OpsWorks Stacks to manage the instance lifecycle.
Why it's wrong here
OpsWorks is not needed; Elastic Beanstalk manages instances.
✗
Create a CloudWatch alarm that triggers an SNS notification when an instance fails.
Why it's wrong here
An alarm notifies but does not automatically replace the instance.

Common exam traps

Common exam trap: NAT rules depend on direction and matching traffic

NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.

Detailed technical explanation

How to think about this question

NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.

KKey Concepts to Remember

Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.

TExam Day Tips

Identify inside and outside interfaces first.
Check whether the scenario needs static NAT, dynamic NAT or PAT.
Do not confuse NAT matching ACLs with normal packet-filtering intent.

Key takeaway

NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

Real-world example

How this comes up in practice

An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.

What to study next

Got this wrong? Here's your next step.

Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SOA-C02 NAT questions on configuration and troubleshooting.

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FAQ

Questions learners often ask

What does this SOA-C02 question test?

Deployment, Provisioning, and Automation — This question tests Deployment, Provisioning, and Automation — Static NAT maps one inside address to one outside address..

What is the correct answer to this question?

The correct answer is: Enable the environment's health check and set the health check path to a valid endpoint. — Option A (Auto Scaling group with a minimum of 2 instances) is correct for high availability. Option B (Load balancer) is correct for distributing traffic. Option D (Health check) is correct for detecting failures. Option C is incorrect because OpsWorks is a different service. Option E is incorrect because CloudWatch alarms alert but do not automatically replace instances without Auto Scaling.

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

What is the key concept behind this question?

Static NAT maps one inside address to one outside address.

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This SOA-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 SOA-C02 exam.