Which activity is used to detect bugs and irregularities in the developed web applications?

• A. Dynamic Application Security Testing (DAST)
• B. Source code reviews
• C. Web vulnerability scanning
• D. Fuzz testing

Answer: (B)

Reviewing the source code to identify defects and irregularities focuses on the code itself, making it a static verification activity. By inspecting how the program is written—its logic, control flow, error handling, and how security concerns are addressed—you can uncover bugs and flaws early, often before the application is run in production. This upfront scrutiny helps catch issues that might not surface during normal operation and can reduce debugging costs later. In contrast, methods that test a live, running application—such as testing from the outside, automated web scanning, or fuzzing inputs—reveal vulnerabilities and robustness problems after the code is executing, rather than pinpointing root causes in the source. Therefore, source code reviews are the approach used to detect bugs and irregularities in developed web applications.