Which statement about logs and monitoring is true?

Which statement about logs and monitoring is true?

• A. Logs are for dashboard visualization only.
• B. Metrics and logs are interchangeable.
• C. Logs capture events; metrics capture numerical health; monitoring uses both for observability.
• D. Monitoring eliminates the need for logs.

Answer: (C)

Logs capture events with details and timestamps, providing a narrative of what happened. Metrics, on the other hand, are numerical summaries that describe the system’s health over time, such as latency, error rate, or throughput. Monitoring is about continuously observing these signals to understand how the system is behaving and to detect problems. Using both logs and metrics gives a complete picture: metrics show overall health and trends, while logs supply the granular context needed to investigate incidents. That combination is why the statement is true. The other ideas fall short because logs aren’t used only for dashboards; they’re essential for in-depth analysis and debugging. Metrics aren’t interchangeable with logs—each serves a different purpose and they complement one another. And monitoring doesn’t replace logs; you still rely on logs to diagnose root causes even as you use metrics to spot anomalies and drive alerts.

Logs capture events with details and timestamps, providing a narrative of what happened. Metrics, on the other hand, are numerical summaries that describe the system’s health over time, such as latency, error rate, or throughput. Monitoring is about continuously observing these signals to understand how the system is behaving and to detect problems. Using both logs and metrics gives a complete picture: metrics show overall health and trends, while logs supply the granular context needed to investigate incidents. That combination is why the statement is true.

The other ideas fall short because logs aren’t used only for dashboards; they’re essential for in-depth analysis and debugging. Metrics aren’t interchangeable with logs—each serves a different purpose and they complement one another. And monitoring doesn’t replace logs; you still rely on logs to diagnose root causes even as you use metrics to spot anomalies and drive alerts.