- A
Vulnerability
Why wrong: Vulnerability is the probability of a threat agent succeeding.
- B
Loss Event Frequency (LEF)
Why wrong: LEF is the frequency of loss events, not just threat actions.
- C
Annualized Rate of Occurrence (ARO)
Why wrong: ARO is a broader concept that may include multiple threat events.
- D
Threat Event Frequency (TEF)
TEF measures how often a threat agent acts.
Question 705 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, which component represents the probable frequency, within a given timeframe, that a threat agent will act against an asset?
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 (TEF)
In the FAIR model, Threat Event Frequency (TEF) is the component that estimates how often, within a given timeframe, a threat agent (such as a hacker or malware) will initiate an action against an asset. This directly matches the question's definition of 'probable frequency that a threat agent will act against an asset.' TEF is a primary input for calculating Loss Event Frequency (LEF) and ultimately risk.
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.
- ✗
Vulnerability
Why it's wrong here
Vulnerability is the probability of a threat agent succeeding.
- ✗
Loss Event Frequency (LEF)
Why it's wrong here
LEF is the frequency of loss events, not just threat actions.
- ✗
Annualized Rate of Occurrence (ARO)
Why it's wrong here
ARO is a broader concept that may include multiple threat events.
- ✓
Threat Event Frequency (TEF)
Why this is correct
TEF measures how often a threat agent acts.
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 Loss Event Frequency (LEF) with Threat Event Frequency (TEF), because LEF is the more commonly cited output in risk reports, but the question specifically asks for the frequency of the threat agent acting, not the resulting loss event.
Detailed technical explanation
How to think about this question
Under the hood, FAIR decomposes risk into two primary branches: Loss Event Frequency (LEF) and Loss Magnitude (LM). TEF sits under LEF and is further broken down into Contact Frequency and Probability of Action, allowing analysts to model both the likelihood of a threat agent encountering an asset and the likelihood they will act. In a real-world scenario, a firewall vulnerability might have a high TEF due to automated scanning bots (contact frequency) but a low probability of action if the exploit requires manual interaction, demonstrating how TEF granularity affects risk calculations.
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 (TEF) — In the FAIR model, Threat Event Frequency (TEF) is the component that estimates how often, within a given timeframe, a threat agent (such as a hacker or malware) will initiate an action against an asset. This directly matches the question's definition of 'probable frequency that a threat agent will act against an asset.' TEF is a primary input for calculating Loss Event Frequency (LEF) and ultimately risk.
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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