What are essential security and quality practices for software development and deployment?

• A. Secure coding, input validation, regular testing, code reviews, dependency management, and production monitoring.
• B. Creative design, marketing strategies, user onboarding, and sales analytics.
• C. Only unit testing is necessary for quality.
• D. Security is optional during development.

Answer: (A)

Focusing on security and quality across the whole development and deployment process means adopting practices that address both how code is written and how it behaves in the real world. Secure coding and input validation reduce the chance that vulnerabilities slip in through user data or careless coding decisions. Regular testing across different types—unit, integration, security, and performance—helps find defects and weaknesses early, before they reach users. Code reviews bring additional perspectives to catch issues you might miss solo and to promote safer, cleaner code. Dependency management keeps third-party libraries and frameworks up to date, reducing exposure to known vulnerabilities in the software supply chain. Production monitoring provides visibility into how the system actually runs, enabling quick detection and response to incidents or degradations after deployment. Together, these practices support robust security and dependable quality throughout the entire lifecycle.

Other options miss essential parts of the picture or treat security as optional, focusing on nontechnical goals or relying on a single testing type, which isn’t enough to ensure safe and reliable software.