Microsoft Certified: Azure Fundamentals (AZ-900) Practice Exam

Application security falls under shared responsibility because it involves both the cloud service provider, such as Azure, and the customer. In a shared responsibility model, the cloud provider is responsible for securing the infrastructure, including the physical servers, networks, and data centers. On the other hand, the customer is responsible for securing the applications they deploy in the cloud, such as ensuring code quality, managing access controls, and implementing security measures.

This model is essential because it delineates which aspects of security are managed by each party, allowing customers to understand their role in protecting their applications. While many might think that cloud providers are solely responsible for application security, the reality is that customers must also take proactive measures to protect their own applications from various threats, such as vulnerabilities and data breaches.

The other options do not accurately represent the division of responsibilities when it comes to application security. User responsibility focuses more on end-user behavior and actions, Azure responsibility would imply that all security is managed by Azure alone, and government responsibility relates to compliance with governmental regulations rather than application security specifically. This distinction emphasizes the need for collaboration between the cloud provider and the customer to ensure comprehensive security measures are in place.