This SSCP practice question tests your understanding of access controls. 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 TWO of the following are characteristics of a Mandatory Access Control (MAC) system?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Access decisions are based on security labels.
Option A is correct because Mandatory Access Control (MAC) systems use security labels (e.g., classifications like Top Secret, Secret, Confidential) attached to subjects and objects. The operating system or reference monitor enforces access decisions based on these labels and a set of rules (e.g., the Bell-LaPadula model's simple security property and *-property), not at the discretion of users or owners. This ensures that access is determined by a central policy, typically implemented via labels in systems like SELinux or Trusted Solaris.
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.
✓
Access decisions are based on security labels.
Why this is correct
MAC relies on labels assigned to subjects and objects to determine access.
Related concept
Read the scenario before looking for a memorised answer.
✗
Access is determined by the owner of the object.
Why it's wrong here
In MAC, the system (not the owner) controls access based on policy.
✗
It uses roles to assign permissions.
Why it's wrong here
Roles are used in RBAC, not MAC.
✗
Users can change permissions on their own objects.
Why it's wrong here
This is a characteristic of DAC, not MAC.
✓
It is commonly used in military environments.
Why this is correct
MAC is designed for high-security environments like military where classification levels are used.
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 MAC with DAC or RBAC, mistakenly thinking that owners or roles can override label-based policies, when in fact MAC strictly enforces system-wide rules that neither users nor owners can modify.
Detailed technical explanation
How to think about this question
Under the hood, MAC systems rely on a security kernel that mediates every access attempt by comparing the subject's clearance label (e.g., Secret) with the object's classification label (e.g., Top Secret) using a lattice-based model. A real-world scenario is a military multilevel secure (MLS) database where a user cleared for Secret cannot read a Top Secret document, even if they created it, because the system enforces the *-property (no read up). This prevents information leakage even from compromised accounts, as labels are immutable and centrally managed.
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 security analyst at a medium-sized enterprise encounters this scenario during an investigation or architecture review. The correct answer reflects best practice for the specific threat or control described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Security exam questions test whether you can match controls to threats in context — not just recall definitions.
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.
Access Controls — This question tests Access Controls — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Access decisions are based on security labels. — Option A is correct because Mandatory Access Control (MAC) systems use security labels (e.g., classifications like Top Secret, Secret, Confidential) attached to subjects and objects. The operating system or reference monitor enforces access decisions based on these labels and a set of rules (e.g., the Bell-LaPadula model's simple security property and *-property), not at the discretion of users or owners. This ensures that access is determined by a central policy, typically implemented via labels in systems like SELinux or Trusted Solaris.
What should I do if I get this SSCP 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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Question Discussion
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