- A
Threat Event Frequency × Asset Value
Why wrong: Incorrect; asset value is part of loss magnitude.
- B
Threat Event Frequency × Vulnerability
Correct; LEF = TEF × V.
- C
Threat Event Frequency × Loss Magnitude
Why wrong: Incorrect; that would be ALE-like but not LEF.
- D
Annualized Rate of Occurrence × Single Loss Expectancy
Why wrong: Incorrect; that's ALE.
Question 296 of 1,000
CRISC IT Risk Assessment Practice Question
This CRISC practice question tests your understanding of it risk assessment. 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.
In the FAIR model, 'Loss Event Frequency' is calculated as:
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
✓
Threat Event Frequency × Vulnerability
In the FAIR model, Loss Event Frequency (LEF) is the product of Threat Event Frequency (TEF) and Vulnerability (Vuln). This represents how often a threat agent successfully exploits a weakness, making option B correct. The formula is LEF = TEF × Vuln, where Vulnerability is the probability that a threat event will result in a loss.
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.
- ✗
Threat Event Frequency × Asset Value
Why it's wrong here
Incorrect; asset value is part of loss magnitude.
- ✓
Threat Event Frequency × Vulnerability
Why this is correct
Correct; LEF = TEF × V.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Threat Event Frequency × Loss Magnitude
Why it's wrong here
Incorrect; that would be ALE-like but not LEF.
- ✗
Annualized Rate of Occurrence × Single Loss Expectancy
Why it's wrong here
Incorrect; that's ALE.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the FAIR model's Loss Event Frequency with the traditional quantitative risk formula ARO × SLE, leading them to select option D, but FAIR separates frequency from magnitude and uses Vulnerability as a probability factor rather than a direct loss value.
Detailed technical explanation
How to think about this question
Under the hood, FAIR decomposes risk into two primary branches: Loss Event Frequency and Loss Magnitude. Loss Event Frequency itself is further broken down into Threat Event Frequency (how often a threat agent acts) and Vulnerability (the probability that the action will succeed, often derived from control strength and threat capability). In practice, a high TEF with a low Vulnerability (e.g., a well-patched system) yields a lower LEF, while a low TEF with high Vulnerability (e.g., a rarely targeted but unpatched legacy system) can still produce a significant LEF. This decomposition helps organizations prioritize controls by targeting either the frequency of threats or the likelihood of exploitation.
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 practitioner preparing for the CRISC exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this CRISC question test?
IT Risk Assessment — This question tests IT Risk Assessment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Threat Event Frequency × Vulnerability — In the FAIR model, Loss Event Frequency (LEF) is the product of Threat Event Frequency (TEF) and Vulnerability (Vuln). This represents how often a threat agent successfully exploits a weakness, making option B correct. The formula is LEF = TEF × Vuln, where Vulnerability is the probability that a threat event will result in a loss.
What should I do if I get this CRISC 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.
About these practice questions
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Last reviewed: Jul 4, 2026
This CRISC practice question is part of Courseiva's free ISACA 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 CRISC exam.
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