Answer: Ensure that relevant system metrics are being captured with Cloud Monitoring, and create alerts at levels of interest., Review your increased capacity requirements and plan for the required quota management.

To prepare your application for potential failures during a large marketing event, it's crucial to monitor system performance and manage capacity effectively. Configuring Anthos Service Mesh (Option A) can help identify issues on the topology map, but it's more about service visibility and less about direct failure preparation. Ensuring relevant system metrics are captured with Cloud Monitoring and creating alerts (Option B) is essential for proactive issue detection. Reviewing increased capacity requirements and planning for quota management (Option C) is critical to handle the expected traffic surge. Monitoring latency for average percentile latency (Option D) is important for performance but doesn't directly address failure preparation. Creating alerts for all common failures (Option E) is a good practice but may not cover all potential issues during the event. Therefore, the most effective strategies are monitoring system metrics with alerts and managing capacity and quotas.

Author: LeetQuiz Editorial Team