🔄 Comparing the Three Strategies

Understanding the differences and relationships between code review, vulnerability assessment, and penetration testing is critical for exam success. Here is how they connect:

Code review happens first, during development. It catches security issues at the earliest and cheapest stage — before the code is even merged. It relies on human expertise and is most effective at catching logic errors, design flaws, and coding mistakes that automated tools often miss.

Vulnerability assessment happens next, typically before and after deployment. It provides a comprehensive, systematic inventory of every known weakness across the entire system. It casts a wide net but does not attempt to exploit what it finds.

Penetration testing is the deepest and most thorough. It goes beyond finding vulnerabilities to actually exploiting them, demonstrating real-world impact. It requires the most skill, takes the most time, and is the most expensive — but it provides the most realistic picture of what an attacker could actually achieve.

Professional security teams use all three in a layered approach: code review during development, vulnerability assessments on a regular schedule (monthly or quarterly), and penetration testing before major releases and annually.