CEH - Certified Ethical Hacker Practice Questions: SQL Injection Domain

Published: June 9, 2025 | 5 min read

Test your CEH - Certified Ethical Hacker knowledge with 5 practice questions from the SQL Injection domain. Includes detailed explanations and answers.

CEH - Certified Ethical Hacker Practice Questions

Master the SQL Injection Domain

Test your knowledge in the SQL Injection domain with these 5 practice questions. Each question is designed to help you prepare for the CEH - Certified Ethical Hacker certification exam with detailed explanations to reinforce your learning.

Question 1

Which of the following is a common sign that a web application might be vulnerable to SQL injection?

A) The application uses HTTPS for data transmission.

B) The application displays error messages with SQL syntax.

C) The application has a CAPTCHA on login forms.

D) The application redirects to a secure page after login.

Show Answer & Explanation

Correct Answer: B

Explanation: CORRECT: Error messages with SQL syntax can indicate that the application is processing SQL queries directly with user input, a potential vulnerability. OPTION A: HTTPS secures data in transit and does not indicate SQL injection vulnerability. OPTION C: CAPTCHAs are used to prevent automated access, not related to SQL injection. OPTION D: Redirecting to a secure page is a security measure, not an indication of vulnerability.

Question 2

While testing a web application, you identify a SQL injection vulnerability. Which of the following actions would be considered unethical?

A) Documenting the vulnerability and informing the client.

B) Exploiting the vulnerability to access unauthorized data.

C) Recommending security measures to fix the vulnerability.

D) Using the vulnerability to perform a denial of service attack on the database.

Show Answer & Explanation

Correct Answer: B

Explanation: CORRECT: Exploiting the vulnerability to access unauthorized data is unethical and may breach legal and ethical standards. OPTION A: Documenting and informing the client is ethical and responsible. OPTION C: Recommending security measures is ethical and helps the client improve security. OPTION D: Using the vulnerability for a denial of service attack is unethical and harmful.

Question 3

A client-side web application is suspected of being vulnerable to SQL injection. What is a potential impact if this vulnerability is exploited?

A) The web server's IP address is exposed.

B) Sensitive data from the database can be extracted.

C) Client-side scripts are executed on the user's browser.

D) The server's SSL certificate is compromised.

Show Answer & Explanation

Correct Answer: B

Explanation: CORRECT: SQL injection can lead to unauthorized access and extraction of sensitive data from the database. OPTION A: SQL injection targets databases, not directly exposing server IPs. OPTION C: SQL injection affects server-side databases, not client-side script execution. OPTION D: SSL certificates are unrelated to SQL injection vulnerabilities.

Question 4

While conducting a vulnerability assessment, you find a parameter that echoes back database error messages. How can this information be used to further exploit SQL Injection?

A) Use the error messages to refine injection payloads for blind SQL Injection.

B) Use the error messages to launch a Distributed Denial of Service (DDoS) attack.

C) Use the error messages to perform a phishing attack.

D) Use the error messages to identify Cross-Site Scripting (XSS) vulnerabilities.

Show Answer & Explanation

Correct Answer: A

Explanation: CORRECT: Database error messages can provide insights into the database structure, allowing for more precise SQL Injection payloads. OPTION B: Error messages do not facilitate DDoS attacks. OPTION C: Phishing attacks do not rely on database error messages. OPTION D: Error messages are not typically used to identify XSS vulnerabilities.

Question 5

During a penetration test, you discover that a web application is vulnerable to SQL injection. Which of the following techniques would allow you to extract data from the database?

A) Using a UNION-based injection to retrieve database tables.

B) Performing a SYN flood attack to disrupt the database connection.

C) Utilizing XSS to execute scripts on the database server.

D) Deploying a DDoS attack to overload the web server.

Show Answer & Explanation

Correct Answer: A

Explanation: CORRECT: UNION-based SQL injection allows attackers to combine results from multiple SELECT statements to extract data. OPTION B: SYN flood attacks target network resources, not databases. OPTION C: XSS targets client-side execution, not direct database interaction. OPTION D: DDoS attacks aim to disrupt service availability, not extract data from databases.

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About CEH - Certified Ethical Hacker Certification

The CEH - Certified Ethical Hacker certification validates your expertise in sql injection and other critical domains. Our comprehensive practice questions are carefully crafted to mirror the actual exam experience and help you identify knowledge gaps before test day.

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