The answer is to freeze the filesystem and flush I/O operations using a tool like fsfreeze, then take the snapshot. This ensures an EBS crash consistent snapshot freeze by pausing all writes and completing pending I/O, so the snapshot captures a state as if the system had crashed, which is safe for database recovery. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this scenario tests your understanding that crash consistency requires quiescing the filesystem without stopping the instance—a common trap is thinking you must stop or detach the volume, which causes downtime. The key is that fsfreeze halts new writes and flushes buffers, allowing a consistent snapshot while the instance remains running. Memory tip: think "Freeze, Flush, Snapshot" to avoid downtime—never stop the instance for crash consistency.
SOA-C02 Reliability and Business Continuity Practice Question
This SOA-C02 practice question tests your understanding of reliability and business continuity. 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 SysOps administrator wants to back up an Amazon EBS volume that is attached to an EC2 instance running a production database. The backup must be crash-consistent and should not cause any downtime. Which TWO steps should the administrator take? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Take a snapshot of the EBS volume after freezing.
Options B and D are correct. To ensure crash consistency, the database should be frozen (e.g., via fsync) and I/O paused. Then take a snapshot of the volume. Option A is incorrect because taking a snapshot of a running volume without freezing may result in an inconsistent backup. Option C is incorrect because stopping the instance causes downtime. Option E is incorrect because detaching the volume causes downtime.
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.
✗
Stop the EC2 instance before taking the snapshot.
Why it's wrong here
Stopping causes downtime.
✗
Take a snapshot directly from the attached volume without any preparation.
Why it's wrong here
Without freezing, the snapshot may be inconsistent.
✗
Detach the volume from the instance before taking a snapshot.
Why it's wrong here
Detaching causes downtime and may not be possible without stopping the instance.
✓
Take a snapshot of the EBS volume after freezing.
Why this is correct
Snapshot after freezing yields crash-consistent backup without downtime.
Related concept
Read the scenario before looking for a memorised answer.
✓
Freeze the filesystem and flush I/O operations using a tool like fsfreeze.
Why this is correct
Freezing ensures a crash-consistent state.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Reliability and Business Continuity — This question tests Reliability and Business Continuity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Take a snapshot of the EBS volume after freezing. — Options B and D are correct. To ensure crash consistency, the database should be frozen (e.g., via fsync) and I/O paused. Then take a snapshot of the volume. Option A is incorrect because taking a snapshot of a running volume without freezing may result in an inconsistent backup. Option C is incorrect because stopping the instance causes downtime. Option E is incorrect because detaching the volume causes downtime.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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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.
Question Discussion
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