- A
UNION-based SQL injection
Why wrong: UNION-based requires visible output to combine results.
- B
Blind time-based SQL injection
Time-based injects SQL delays to infer true/false conditions when no visible output is available.
- C
Out-of-band SQL injection
Why wrong: Out-of-band uses DNS or HTTP requests, but may be restricted and is less common for simple data extraction.
- D
Error-based SQL injection
Why wrong: Error-based relies on database error messages, which may not be displayed.
Question 758 of 1,000
PT0-002 Attacks and Exploits Practice Question
This PT0-002 practice question tests your understanding of attacks and exploits. Compare every option against the stated constraints before choosing — the best answer satisfies all requirements, not just the most obvious one. 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.
During a web application test, a tester discovers a parameter that appears to be vulnerable to SQL injection. They want to extract data from a database using a technique that does not rely on visible output. Which type of SQL injection is most appropriate?
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
✓
Blind time-based SQL injection
Blind SQL injection, specifically time-based, is used when no error or data is returned, allowing inference via time delays.
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.
- ✗
UNION-based SQL injection
Why it's wrong here
UNION-based requires visible output to combine results.
- ✓
Blind time-based SQL injection
Why this is correct
Time-based injects SQL delays to infer true/false conditions when no visible output is available.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Out-of-band SQL injection
- ✗
Error-based SQL injection
Why it's wrong here
Error-based relies on database error messages, which may not be displayed.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
UNION-based requires visible output to combine results.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 PT0-002 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Attacks and Exploits — study guide chapter
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FAQ
Questions learners often ask
What does this PT0-002 question test?
Attacks and Exploits — This question tests Attacks and Exploits — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Blind time-based SQL injection — Blind SQL injection, specifically time-based, is used when no error or data is returned, allowing inference via time delays.
What should I do if I get this PT0-002 question wrong?
Identify which PT0-002 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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 PT0-002 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 PT0-002 exam.
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