PCA PCA Federation & Remote Storage 2

Question 1

In cross-service federation, which metrics are typically federated up to a global Prometheus server?

Accepted Answer

Pre-aggregated or recording-rule-generated metrics relevant at the global level

Answer

Every raw metric from every service target

Answer

Only metrics whose names start with a specific prefix

Answer

Metrics that have been flagged by Alertmanager as critical

Question 2

What happens to 'job' and 'instance' labels when metrics are federated from one Prometheus server to another?

Accepted Answer

They are preserved as-is from the originating Prometheus server

Answer

They are automatically dropped to avoid conflicts

Answer

They are renamed with a 'source_' prefix by default

Answer

They are replaced by the federating server's own job and instance labels

Question 3

Which open-source project extends Prometheus with global query capability and long-term object storage integration?

Accepted Answer

Thanos

Answer

Loki

Answer

Jaeger

Answer

OpenTelemetry Collector

Question 4

What does the queue_config section within a remote_write block control?

Accepted Answer

Tuning parameters for the in-memory send queue such as capacity, batch size, and retry behavior

Answer

The order in which scrape targets are processed

Answer

Priority levels assigned to individual metric series

Answer

Alert notification delivery queues in Alertmanager

Question 5

Which long-term Prometheus storage solution is developed and maintained by Grafana Labs?

Accepted Answer

Mimir

Answer

VictoriaMetrics

Answer

Cortex

Answer

InfluxDB

Question 6

What does setting 'honor_labels: true' in a Prometheus scrape_config do when used for federation?

Accepted Answer

Preserves labels from the scraped target when they conflict with externally-set labels

Answer

Enforces mandatory label requirements on all scraped metrics

Answer

Sorts all metric labels alphabetically before storage

Answer

Validates that label names conform to Prometheus naming rules

Question 7

What flag must be passed to a Prometheus server to allow it to accept remote_write data from other Prometheus instances?

Accepted Answer

--web.enable-remote-write-receiver

Answer

--storage.tsdb.accept-remote-write

Answer

--remote-write-listener

Answer

--enable.push-receiver