DevOps/CloudBackendAround since 2012
Prometheus
A widely used open-source tool that collects and stores time-series metrics (like CPU usage or request counts) from systems, and can trigger alerts when values cross a threshold.
Think of it like
Like a building's network of sensors constantly logging temperature and pressure readings, ready to sound an alarm the moment something drifts out of range.
Junior or senior?
Junior sounds like
Only views Prometheus-backed dashboards someone else built.
Senior sounds like
Has set up the metrics themselves.
Ask them
“What metrics did you set up in Prometheus yourself, versus just viewing dashboards someone else built?”