Microsoft Azure Architect Technologies (AZ-300) Practice Exam

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Regularly applying OS and software patches at the compute layer is an example of which principle?

Integrity
Confidentiality
Availability
Non-repudiation

The correct answer is: Availability

Regularly applying operating system and software patches at the compute layer is primarily related to the principle of availability. Availability ensures that systems and services are operational and accessible when needed. By applying patches, you help prevent vulnerabilities that could be exploited by attackers, which can lead to downtime or service interruptions. Keeping the software updated enhances stability and performance, thereby supporting the continual operation of the systems. The other principles, while important for overall security and compliance, are not directly tied to the act of applying patches. Integrity refers to maintaining the accuracy and completeness of data, which patches can indirectly affect by providing fixes for software bugs that may alter data erroneously if left unaddressed. Confidentiality deals with protecting information from unauthorized access, and non-repudiation ensures that a party cannot deny the authenticity of their signature on a communication or a document. However, those aspects do not fundamentally drive the necessity of regularly updating and patching systems like availability does.