212-89 Web Application Incidents Practice Question
You are auditing Apache logs to detect potential OS command injection. Which characters should you search for in the access logs?
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
✓
';', '|', '&', and '`'
Characters like pipe, semicolon, and backticks are common metacharacters used to chain commands in OS command injection.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
'%20', '+', and '='
Why it's wrong here
These are standard URL encoding characters often used in SQL injection.
- ✗
'{', '}', and '$'
Why it's wrong here
These are usually related to JSON or variable expansion in shell scripts but less common for direct injection.
- ✗
'<', '>', and '/'
Why it's wrong here
These are more indicative of XSS or path traversal attempts.
- ✓
';', '|', '&', and '`'
Why this is correct
These are command separators and execution characters used to append unauthorized commands to input.
About these practice questions
One of 206 original 212-89 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
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 EC-Council exam blueprint
This 212-89 practice question is part of Courseiva's free EC-Council 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 212-89 exam.