ISC Practice Question: Systems Security Implementation Verification And Validation
You are validating the security of a web application. Which TWO of the following actions verify that input validation is effective against SQL injection?
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
✓
Attempting to input common SQL injection characters (e.g., ') in application fields.
Using parameterized queries and reviewing input filter logic are the two most effective ways to verify SQLi defenses.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Attempting to input common SQL injection characters (e.g., ') in application fields.
Why this is correct
Manual testing confirms if the application successfully sanitizes or rejects malicious input.
- ✗
Verifying that the database administrator account has full system access.
Why it's wrong here
This increases the impact of an injection; it is not a defense mechanism.
- ✓
Reviewing source code for the use of parameterized queries or prepared statements.
Why this is correct
Prepared statements are the primary defense against SQL injection.
- ✗
Ensuring the website uses SSL/TLS for all traffic.
Why it's wrong here
TLS does not prevent SQL injection.
- ✗
Checking that the web server is running on the latest patch version.
Why it's wrong here
Patches protect the server, not the application logic from SQLi.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official (ISC)² exam blueprint
This ISC practice question is part of Courseiva's free (ISC)² 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 ISC exam.