The correct configuration is to create subnets in multiple Availability Zones and specify them in the Auto Scaling group. This works because the Auto Scaling group’s “balanced best effort” distribution policy automatically spreads EC2 instances evenly across the specified subnets, ensuring high availability and fault tolerance for a stateless web application. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this concept tests your understanding of how ASGs interact with VPC networking—a common trap is assuming that a single subnet with multiple AZs is possible, or that the “availability-zone” health check type controls distribution. Remember, the ASG distributes instances based on the subnets you provide, not on health check settings. A quick memory tip: “Subnets equal zones—list multiple subnets to spread the load.”
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 provisioning an Auto Scaling group (ASG) for a stateless web application. The ASG should launch EC2 instances in multiple Availability Zones. The administrator needs to ensure that instances are evenly distributed across Availability Zones. Which configuration should the administrator use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create subnets in multiple Availability Zones and specify them in the Auto Scaling group.
Option C is correct because setting the Auto Scaling group to use multiple subnets in different Availability Zones and the 'balanced best effort' distribution policy ensures even distribution. Option A is wrong because a single subnet limits to one AZ. Option B is wrong because same-AZ subnets don't provide multi-AZ. Option D is wrong because 'availability-zone' health check is not a distribution policy.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
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 an 'availability-zone' health check type in the Auto Scaling group.
Why it's wrong here
Health check type does not affect initial distribution.
✓
Create subnets in multiple Availability Zones and specify them in the Auto Scaling group.
Create the Auto Scaling group with a single subnet in one Availability Zone.
Why it's wrong here
This does not distribute across AZs.
✗
Create subnets in multiple Availability Zones but assign them to the same placement group.
Why it's wrong here
Placement groups are for low latency, not distribution.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
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 block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related SOA-C02 subnetting questions on CIDR, address ranges, and subnet selection.
Deployment, Provisioning, and Automation — This question tests Deployment, Provisioning, and Automation — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Create subnets in multiple Availability Zones and specify them in the Auto Scaling group. — Option C is correct because setting the Auto Scaling group to use multiple subnets in different Availability Zones and the 'balanced best effort' distribution policy ensures even distribution. Option A is wrong because a single subnet limits to one AZ. Option B is wrong because same-AZ subnets don't provide multi-AZ. Option D is wrong because 'availability-zone' health check is not a distribution policy.
What should I do if I get this SOA-C02 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related SOA-C02 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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 →
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.
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.
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.
Sign in to join the discussion.