- A
Authentication verifies what a user can do; authorization verifies who the user is.
Why wrong: This reverses the definitions. Authentication verifies identity, authorization verifies permissions.
- B
Authentication verifies who the user is; authorization verifies what the user can do.
Authentication confirms the user's identity (e.g., password, biometric). Authorization determines what resources and actions the user is allowed to access.
- C
Both authentication and authorization verify the user's identity.
Why wrong: Only authentication verifies identity; authorization determines access rights.
- D
Authorization is always performed before authentication.
Why wrong: Authentication always occurs before authorization because the system must know who the user is before deciding what they can do.
Quick Answer
The answer is that authentication verifies who the user is, while authorization verifies what the user can do. This distinction is fundamental because authentication establishes identity through credentials like passwords or biometrics, whereas authorization determines the permissions granted to that verified identity, often enforced via role-based access control or access control lists. On the Microsoft SC-900 exam, this concept tests your understanding of the logical sequence in identity management: a user must first prove their identity before any access rights are evaluated, a pattern seen in Microsoft Entra ID with OAuth 2.0 flows. A common trap is confusing the two when a single credential request seems to grant access, but remember that authorization always depends on successful authentication. For a quick memory tip, think of authentication as checking your ID at the door, and authorization as the key that opens specific rooms inside.
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 administrator is explaining authentication and authorization to new IT staff. Which statement correctly describes the difference between these two processes?
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 who the user is; authorization verifies what the user can do.
Authentication is the process of verifying the identity of a user, device, or other entity, typically through credentials like a password, biometric, or certificate. Authorization determines what an authenticated entity is permitted to do, such as accessing specific resources or performing certain actions, often enforced via access control lists (ACLs) or role-based access control (RBAC). In Microsoft Entra ID, authentication occurs first (e.g., via OAuth 2.0 or SAML), and then authorization is evaluated using claims or directory roles.
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; authorization verifies who the user is.
Why it's wrong here
This reverses the definitions. Authentication verifies identity, authorization verifies permissions.
- ✓
Authentication verifies who the user is; authorization verifies what the user can do.
Why this is correct
Authentication confirms the user's identity (e.g., password, biometric). Authorization determines what resources and actions the user is allowed to access.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Both authentication and authorization verify the user's identity.
Why it's wrong here
Only authentication verifies identity; authorization determines access rights.
- ✗
Authorization is always performed before authentication.
Why it's wrong here
Authentication always occurs before authorization because the system must know who the user is before deciding what they can do.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing the sequence and purpose of authentication versus authorization, leading candidates to reverse the definitions or assume authorization can occur without prior authentication.
Detailed technical explanation
How to think about this question
Under the hood, authentication relies on protocols like Kerberos (using tickets and a Key Distribution Center) or OAuth 2.0 (issuing access tokens after verifying credentials). Authorization decisions are often based on claims within those tokens, such as group membership or roles, and are evaluated by resource servers or policy engines like Azure RBAC. A real-world scenario: a user authenticates via Microsoft Entra ID with a password, then is authorized to read a SharePoint site only if their token includes the 'Sites.Read.All' claim.
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 who the user is; authorization verifies what the user can do. — Authentication is the process of verifying the identity of a user, device, or other entity, typically through credentials like a password, biometric, or certificate. Authorization determines what an authenticated entity is permitted to do, such as accessing specific resources or performing certain actions, often enforced via access control lists (ACLs) or role-based access control (RBAC). In Microsoft Entra ID, authentication occurs first (e.g., via OAuth 2.0 or SAML), and then authorization is evaluated using claims or directory roles.
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.
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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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