DevOps Monitoring & Observability

Question 1

What are the 'three pillars of observability'?

Accepted Answer

Logs, metrics, and traces

Answer

Alerts, dashboards, and incidents

Answer

Uptime, latency, and throughput

Answer

Monitoring, logging, and auditing

Question 2

What is Prometheus primarily used for in a DevOps environment?

Accepted Answer

Collecting and storing time-series metrics with a pull-based model

Answer

Aggregating and searching application logs across services

Answer

Distributed tracing of requests across microservices

Answer

Alerting on infrastructure security vulnerabilities

Question 3

What is Grafana used for?

Accepted Answer

Visualizing metrics and logs from data sources like Prometheus in dashboards

Answer

Collecting application logs from distributed services

Answer

Running load tests against production systems

Answer

Tracing distributed requests across microservices

Question 4

What is an SLO (Service Level Objective)?

Accepted Answer

A target reliability or performance goal for a service, expressed as a measurable metric

Answer

A contractual agreement between a provider and customer about service uptime

Answer

A threshold that triggers an alert when a metric exceeds it

Answer

A budget for acceptable downtime over a given period

Question 5

What is an 'error budget' in Site Reliability Engineering (SRE)?

Accepted Answer

The permissible amount of unreliability remaining before an SLO is violated

Answer

The cost allocated for fixing production incidents

Answer

The maximum number of errors allowed per minute in production

Answer

The time budget for on-call engineers to respond to incidents

Question 6

What does MTTR stand for in incident management?

Accepted Answer

Mean Time to Recovery — average time to restore service after an incident

Answer

Mean Time to Report — average time to notify stakeholders of an incident

Answer

Maximum Time to Resolve — SLA-defined resolution deadline

Answer

Mean Time to Respond — average time for on-call to acknowledge an alert