- A
Input validation and sanitization
Validating and sanitizing inputs removes or neutralizes malicious content.
- B
Output filtering and guardrails
Output filtering blocks harmful responses, including those from prompt injection.
- C
Red teaming the model
Why wrong: Red teaming identifies vulnerabilities but is not a runtime control.
- D
Rate limiting on API calls
Why wrong: Rate limiting prevents abuse but does not detect or block injection attacks.
- E
Differential privacy during training
Why wrong: Differential privacy protects training data, not runtime injection.
Question 837 of 1,000
AI0-001 AI Security Practice Question
This AI0-001 practice question tests your understanding of ai security. 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.
A security engineer is hardening an LLM application against prompt injection attacks. Which TWO controls should be implemented? (Choose two.)
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
✓
Input validation and sanitization
Input validation and sanitization (A) are correct because they prevent malicious user inputs from being interpreted as system-level instructions by the LLM. By stripping or escaping special characters and known prompt injection patterns (e.g., 'ignore previous instructions'), the application reduces the attack surface. This is a fundamental defense-in-depth layer against direct prompt injection.
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.
- ✓
Input validation and sanitization
Why this is correct
Validating and sanitizing inputs removes or neutralizes malicious content.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Output filtering and guardrails
Why this is correct
Output filtering blocks harmful responses, including those from prompt injection.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Red teaming the model
Why it's wrong here
Red teaming identifies vulnerabilities but is not a runtime control.
- ✗
Rate limiting on API calls
Why it's wrong here
Rate limiting prevents abuse but does not detect or block injection attacks.
- ✗
Differential privacy during training
Why it's wrong here
Differential privacy protects training data, not runtime injection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between proactive runtime controls (input/output filtering) and non-runtime activities (red teaming, training-time techniques), leading candidates to mistakenly select red teaming as a control instead of a testing method.
Detailed technical explanation
How to think about this question
Output filtering and guardrails (B) work by applying a secondary LLM or regex-based classifier to the model's output, blocking or rewriting responses that contain disallowed content (e.g., leaked secrets, harmful instructions). In practice, a common approach is to use a 'safety classifier' like Llama Guard or a custom set of rules that checks for patterns like 'Here are the steps to...' when the input was a jailbreak attempt. This dual-layer control (input sanitization + output filtering) is recommended by OWASP's LLM Top 10.
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 AI0-001 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 AI0-001 question test?
AI Security — This question tests AI Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Input validation and sanitization — Input validation and sanitization (A) are correct because they prevent malicious user inputs from being interpreted as system-level instructions by the LLM. By stripping or escaping special characters and known prompt injection patterns (e.g., 'ignore previous instructions'), the application reduces the attack surface. This is a fundamental defense-in-depth layer against direct prompt injection.
What should I do if I get this AI0-001 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
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jul 4, 2026
This AI0-001 practice question is part of Courseiva's free CompTIA 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 AI0-001 exam.
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