- A
Permissions
Why wrong: Permissions are individual actions, but the concept of defining what you can do is authorization.
- B
Authentication
Why wrong: Authentication verifies who you are, not what you can do.
- C
Authorization
Authorization determines what actions are permitted.
- D
Roles
Why wrong: Roles are collections of permissions, but the concept of defining actions is authorization.
Question 854 of 1,000
Cloud Digital Leader Google Cloud Security Practice Question
This GCDL practice question tests your understanding of google cloud 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 IAM concept defines what actions a user can perform on a resource?
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
✓
Authorization
Authorization defines what actions are allowed. Authentication verifies identity. Roles and permissions are part of authorization. The question asks for the concept that defines actions.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Permissions
Why it's wrong here
Permissions are individual actions, but the concept of defining what you can do is authorization.
- ✗
Authentication
Why it's wrong here
Authentication verifies who you are, not what you can do.
- ✓
Authorization
Why this is correct
Authorization determines what actions are permitted.
Related concept
Authentication checks who the user is.
- ✗
Roles
Why it's wrong here
Roles are collections of permissions, but the concept of defining actions is authorization.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related GCDL questions on access control and AAA configuration.
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FAQ
Questions learners often ask
What does this GCDL question test?
Google Cloud Security — This question tests Google Cloud Security — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Authorization — Authorization defines what actions are allowed. Authentication verifies identity. Roles and permissions are part of authorization. The question asks for the concept that defines actions.
What should I do if I get this GCDL question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related GCDL questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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Last reviewed: Jul 4, 2026
This GCDL practice question is part of Courseiva's free Google Cloud 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 GCDL exam.
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