Code quality and security are tightly connected in DevSecOps because poorly written code often introduces vulnerabilities such as injection flaws, insecure authentication, and improper error handling. High-quality code follows secure coding standards, reduces complexity, and makes security issues easier to detect early through automated scans. Tools like static code analysis, linters, and security testing help teams identify both quality issues and security risks during development. By improving code readability, maintainability, and consistency, organizations reduce attack surfaces and speed up remediation. Learning this integration through an Azure DevSecOps Course helps professionals understand how quality gates and security checks work together in real-world CI/CD pipelines.