Quiz: Advanced Module (Linkerd + Progressive Delivery)

Questions

Why is progressive rollout safer than immediate 100% rollout?
What is the main value of Linkerd in canary operations?
Which signal is mandatory for automated canary abort decisions?
Why should A/B routing be time-bounded?
Which statement is correct?

A) Canary without abort criteria is acceptable in production.
B) Mesh telemetry can provide per-route success/latency for rollout decisions.
C) A/B rules should stay permanently after experiment end.

Give one valid canary traffic progression pattern.
What is the safest first action when canary error rate spikes?
A/B test shows no measurable improvement. Best response:

A) keep split active indefinitely
B) revert experiment and record result
C) increase blast radius immediately

Why is develop/staging rehearsal required before production canary?
Complete the guardrail:

A) no SLO gates, no progressive delivery
B) canary gates are optional when release is urgent
C) route split alone guarantees safety

Answer Key (Short)

It limits blast radius and enables earlier failure detection.
Service-level telemetry and identity/mTLS guarantees.
Explicit SLO thresholds (for example error rate and latency).
To prevent long-lived routing drift and unclear ownership.
B
Example: 5% -> 25% -> 50% -> 100%.
Abort/rollback and investigate with metrics and events.
B
It validates policy, telemetry, and rollback path safely.
A