DevOps/CloudBackendAround since 2010
ELK Stack
Also written as Elastic Stack, Logstash, Kibana, Log Aggregation
A common set of tools (Elasticsearch, Logstash, Kibana) for collecting logs from many systems into one searchable place, so engineers aren't SSHing into individual servers to read log files during an incident.
Think of it like
Like a company mailroom that collects every department's memos into one searchable archive, instead of engineers having to visit each department's own filing cabinet.
Junior or senior?
Junior sounds like
Has only viewed a log dashboard someone else built.
Senior sounds like
Has written a search query themselves to debug a real incident.
Ask them
“Tell me about an incident you actually debugged by searching through aggregated logs. What were you looking for?”