- A
Authentication verifies what a user can do, while authorization verifies who the user is.
Why wrong: This reverses the definitions. Authentication verifies identity, authorization verifies permissions.
- B
Authorization must always occur before authentication.
Why wrong: Authentication occurs first to verify identity, then authorization determines what actions are allowed.
- C
Authentication verifies the identity of a user, while authorization determines the resources they can access.
Authentication confirms who you are, and authorization defines what you are allowed to do after your identity is verified.
- D
Authentication and authorization are synonymous terms in identity management.
Why wrong: They are distinct processes; authentication establishes identity, authorization grants permissions.
Quick Answer
The correct answer is that authentication verifies the identity of a user, while authorization determines the resources they can access. This distinction is fundamental because authentication confirms *who you are*—using credentials like a password, biometric scan, or certificate—whereas authorization dictates *what you are allowed to do* after your identity is proven. On the Microsoft SC-900 exam, this concept tests your understanding of the identity management flow in Microsoft Entra ID, where authentication occurs first via protocols like OpenID Connect, and authorization is then enforced through role-based access control (RBAC) or conditional access policies. A common trap is confusing the two terms or thinking they happen simultaneously; in reality, authentication always precedes authorization. To remember the difference, think of authentication as checking your ID at the door, and authorization as the list of rooms you are permitted to enter.
SC-900 Practice Question: Describe the concepts of security, compliance, and identity
This SC-900 practice question tests your understanding of describe the concepts of security, compliance, and identity. 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 security architect is explaining identity management concepts to the IT team. Which statement correctly describes the difference between authentication and authorization?
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
Authentication verifies the identity of a user, while authorization determines the resources they can access.
Option C is correct because authentication is the process of verifying a user's identity (e.g., via password, biometric, or certificate), while authorization determines what resources or actions that authenticated identity is permitted to access. In Microsoft Entra ID, authentication occurs first via protocols like OAuth 2.0 or OpenID Connect, and authorization is then enforced through role-based access control (RBAC) or conditional access policies.
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.
- ✗
Authentication verifies what a user can do, while authorization verifies who the user is.
Why it's wrong here
This reverses the definitions. Authentication verifies identity, authorization verifies permissions.
- ✗
Authorization must always occur before authentication.
Why it's wrong here
Authentication occurs first to verify identity, then authorization determines what actions are allowed.
- ✓
Authentication verifies the identity of a user, while authorization determines the resources they can access.
Why this is correct
Authentication confirms who you are, and authorization defines what you are allowed to do after your identity is verified.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Authentication and authorization are synonymous terms in identity management.
Why it's wrong here
They are distinct processes; authentication establishes identity, authorization grants permissions.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the order or swap the definitions of authentication and authorization, leading them to pick Option A or B, but the key is remembering that authentication always precedes authorization and that they are distinct processes.
Detailed technical explanation
How to think about this question
Under the hood, authentication in Microsoft Entra ID relies on token issuance via OpenID Connect (ID token) to prove identity, while authorization uses OAuth 2.0 scopes and roles to grant access to APIs or resources. A subtle behavior is that a user can be authenticated but still denied access due to conditional access policies or RBAC, emphasizing that authorization is a separate enforcement layer. In a real-world scenario, a user may successfully authenticate to Azure Portal but be unable to read a storage account because they lack the 'Storage Blob Data Reader' role assignment.
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.
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Describe the concepts of security, compliance, and identity — study guide chapter
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FAQ
Questions learners often ask
What does this SC-900 question test?
Describe the concepts of security, compliance, and identity — This question tests Describe the concepts of security, compliance, and identity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Authentication verifies the identity of a user, while authorization determines the resources they can access. — Option C is correct because authentication is the process of verifying a user's identity (e.g., via password, biometric, or certificate), while authorization determines what resources or actions that authenticated identity is permitted to access. In Microsoft Entra ID, authentication occurs first via protocols like OAuth 2.0 or OpenID Connect, and authorization is then enforced through role-based access control (RBAC) or conditional access policies.
What should I do if I get this SC-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Same concept, more angles
1 more ways this is tested on SC-900
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A user authenticates to a company's network by entering their password and then approving a push notification on their mobile phone. After authentication, the user attempts to access a shared folder containing financial reports. The access is denied because the user's account is not a member of the 'Finance' group. Which security concept is demonstrated when the user is denied access to the folder?
easy- A.Authentication
- ✓ B.Authorization
- C.Non-repudiation
- D.Accounting
Why B: Authorization is the security concept that determines what resources a user is allowed to access after their identity has been verified. In this scenario, the user successfully authenticated but was denied access to the financial reports folder because their account lacked the necessary permissions—specifically, membership in the 'Finance' group. This access control decision is the essence of authorization, which enforces policies based on identity attributes like group membership.
Last reviewed: Jun 11, 2026
This SC-900 practice question is part of Courseiva's free Microsoft 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 SC-900 exam.
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