The answer is that the principle of least privilege is best described by granting permissions based on the user's role and need-to-know. This is correct because the core technical concept dictates that every user, process, or system should operate using the minimum set of permissions necessary to perform its function, nothing more. In a cloud-based IAM system, this is typically enforced through role-based access control (RBAC) or attribute-based access control (ABAC), which dynamically map permissions to job duties and contextual attributes, thereby reducing the attack surface and limiting blast radius in case of compromise. On the CISA exam, this principle tests your understanding of access control models and risk mitigation strategies; a common trap is confusing least privilege with separation of duties or assuming it means granting all permissions a user might ever need. Remember the mnemonic: “Least means least—only what’s needed for the feast.”
CISA Protection of Information Assets Practice Question
This CISA practice question tests your understanding of protection of information assets. 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.
A company is implementing a cloud-based identity and access management (IAM) system. Which of the following best describes the principle of least privilege in this context?
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.
Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Permissions should be granted based on the user's role and need-to-know.
Option D is correct because the principle of least privilege dictates that users should be granted only the permissions necessary to perform their job functions, based on their role and need-to-know. In a cloud-based IAM system, this is typically implemented through role-based access control (RBAC) or attribute-based access control (ABAC), ensuring minimal exposure to sensitive resources and reducing the attack surface.
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.
✗
Users should have administrative rights for troubleshooting.
Why it's wrong here
Administrative rights exceed least privilege unless strictly necessary.
✗
Permissions should be revoked only when an employee leaves the company.
Why it's wrong here
Permissions should be reviewed and adjusted frequently, not just upon termination.
✗
All users should have the same level of access for consistency.
Why it's wrong here
Uniform access violates least privilege as it grants excessive permissions to many.
✓
Permissions should be granted based on the user's role and need-to-know.
Why this is correct
Correct. Least privilege aligns with role-based access and minimum necessary permissions.
Clue confirmation
The clue words "best", "least" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'least privilege' with 'administrative convenience' or 'consistency,' mistakenly thinking that granting admin rights for troubleshooting (Option A) or uniform access (Option C) simplifies management, when in fact these practices directly violate the core security principle.
Detailed technical explanation
How to think about this question
In cloud IAM systems like AWS IAM or Azure AD, least privilege is enforced using policies that define explicit Allow and Deny actions, often with conditions (e.g., source IP, MFA status). A common subtlety is that permissions are evaluated with an implicit Deny, so any missing Allow effectively blocks access, but overlapping policies can create unintended grants if not carefully scoped. Real-world scenarios, such as a developer needing read-only access to a production database, require granular policies (e.g., AWS IAM policy with 'Effect': 'Allow', 'Action': 'rds:Describe*', 'Resource': 'arn:aws:rds:...') rather than broad administrative roles.
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 junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
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.
Protection of Information Assets — This question tests Protection of Information Assets — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Permissions should be granted based on the user's role and need-to-know. — Option D is correct because the principle of least privilege dictates that users should be granted only the permissions necessary to perform their job functions, based on their role and need-to-know. In a cloud-based IAM system, this is typically implemented through role-based access control (RBAC) or attribute-based access control (ABAC), ensuring minimal exposure to sensitive resources and reducing the attack surface.
What should I do if I get this CISA 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", "least". 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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Question Discussion
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