Monitoring Logging Basics MCQs with Answers and Explanations

The ELK Stack — Elasticsearch, Logstash, and Kibana — is a popular open-source stack for centralized log management. Logstash collects logs, Elasticsearch indexes them, and Kibana provides visualization dashboards.

Health checks periodically test whether a container or service is working correctly. If a health check fails, Docker or Kubernetes can automatically restart or replace the unhealthy container to maintain availability.

Monitoring in DevOps provides continuous visibility into system health, performance, and errors. It helps teams detect incidents early, understand trends, and maintain SLAs through alerting and dashboards.

Prometheus is a widely used open-source metrics monitoring and alerting system. It is commonly paired with Grafana to create real-time dashboards for visualizing application and infrastructure metrics.