The answer is separation of duties. This security principle is the correct choice because it mandates that critical tasks, such as creating and approving a purchase order, must be split between different individuals to prevent any single person from having unchecked control over a financial process. By enforcing this division, the organization directly mitigates the risk of fraud, errors, and unauthorized transactions, ensuring that no one person can both initiate and authorize a transaction. On the Systems Security Certified Practitioner SSCP exam, this concept tests your understanding of preventive access controls and is often presented in scenarios involving financial systems or change management. A common trap is confusing it with least privilege, but remember: least privilege limits what a user can access, while separation of duties limits who can perform conflicting actions. A helpful memory tip is to think of the phrase “two sets of eyes” — if one person can do it all, the control is broken.
SSCP Access Controls Practice Question
This SSCP practice question tests your understanding of access controls. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
An organization implements a policy that the same individual cannot both create a purchase order and approve it in the financial system. Which security principle does this control primarily enforce?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Separation of duties
Separation of duties (SoD) is the security principle that prevents a single individual from performing conflicting tasks, such as creating and approving a purchase order. By splitting these responsibilities, the organization reduces the risk of fraud, errors, and unauthorized transactions, ensuring that no single person has unchecked control over a critical financial process.
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.
✗
Job rotation
Why it's wrong here
Job rotation moves employees between roles to cross-train and detect fraud, but is not the primary principle here.
✗
Least privilege
Why it's wrong here
Least privilege restricts a user's permissions to the minimum necessary for their job, but does not inherently prevent overlapping roles.
✗
Need-to-know
Why it's wrong here
Need-to-know restricts access to information only if required for the user's duties, not about process segregation.
✓
Separation of duties
Why this is correct
Separation of duties divides critical functions among multiple users to prevent fraud and errors.
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 confuse separation of duties with least privilege, but least privilege only limits permissions to the minimum needed, whereas separation of duties specifically prevents a single user from executing two conflicting functions that could enable fraud or error.
Detailed technical explanation
How to think about this question
In financial systems, separation of duties is often enforced through role-based access control (RBAC) with mutually exclusive roles, such as 'Purchase Order Creator' and 'Purchase Order Approver'. Under the hood, the system checks the user's role at each step and denies the approval action if the user's ID matches the creator's ID, even if they hold both roles. A real-world scenario is in ERP systems like SAP, where SoD violations are flagged during access certification reviews to comply with SOX (Sarbanes-Oxley) audit requirements.
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: Separation of duties — Separation of duties (SoD) is the security principle that prevents a single individual from performing conflicting tasks, such as creating and approving a purchase order. By splitting these responsibilities, the organization reduces the risk of fraud, errors, and unauthorized transactions, ensuring that no single person has unchecked control over a critical financial process.
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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