The answer is to enable multi-factor authentication (MFA) and avoid using the root user. This is correct because the AWS root user has unrestricted, irrevocable access to all resources and billing, making it the highest-value target for attackers; MFA adds a critical second layer of defense beyond the password, and limiting root user usage to only a few essential account-level tasks drastically reduces the attack surface. On the AWS Certified Security Specialty SCS-C02 exam, this concept frequently appears in questions testing the principle of least privilege and identity management, often with a trap where a distractor suggests using root for daily administrative work or storing root credentials in plaintext. Remember the memory tip: "Root is for setup, not for daily upkeep" — if you ever see a scenario involving routine operations, the root user should never be the answer.
SCS-C02 Infrastructure Security Practice Question
This SCS-C02 practice question tests your understanding of infrastructure security. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Which of the following is a best practice for securing an AWS account root user?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable multi-factor authentication (MFA) and avoid using the root user.
Option B is correct because the AWS root user has unrestricted access to all AWS resources and services, making it a high-value target. Enabling multi-factor authentication (MFA) adds an extra layer of security beyond the password, and AWS best practices dictate that the root user should only be used for a limited set of tasks (e.g., changing account settings) and never for daily operations. This minimizes the attack surface and reduces the risk of compromise.
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.
✗
Create access keys for the root user and use them for API calls.
Why it's wrong here
Access keys for root user are not recommended.
✓
Enable multi-factor authentication (MFA) and avoid using the root user.
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use the root user for daily administrative tasks.
Why it's wrong here
Root user should not be used for daily tasks.
✗
Share the root user password with the IT team for emergency access.
Why it's wrong here
Sharing passwords is insecure.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think the root user is necessary for daily administration or that sharing credentials is acceptable for emergencies, but AWS explicitly prohibits these practices in favor of IAM roles and MFA-protected root user access only for account-level changes.
Detailed technical explanation
How to think about this question
The root user is associated with the email address used to create the AWS account and has full, unrestricted access to all services and resources, including billing and account closure. AWS recommends enabling MFA on the root user and storing the MFA device securely, as the root user cannot be deleted or have its permissions reduced. In a real-world scenario, if a root user access key is compromised, an attacker could delete all resources and close the account, with no way to revoke the key without contacting AWS support.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Infrastructure Security — This question tests Infrastructure Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable multi-factor authentication (MFA) and avoid using the root user. — Option B is correct because the AWS root user has unrestricted access to all AWS resources and services, making it a high-value target. Enabling multi-factor authentication (MFA) adds an extra layer of security beyond the password, and AWS best practices dictate that the root user should only be used for a limited set of tasks (e.g., changing account settings) and never for daily operations. This minimizes the attack surface and reduces the risk of compromise.
What should I do if I get this SCS-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This SCS-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 SCS-C02 exam.
Question Discussion
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