3.1 Balancing Change, Velocity, and Reliability of the Service PROFESSIONAL-CLOUD-DEVOPS-ENGINEER Practice Questions (Page 3)

Questions 11–12

1. 11application · medium

   A team runs a real-time chat service. They want to define an SLI for latency. Which metric is the most appropriate?

   • AThe average latency of the WebSocket connection.
   • BThe p50 latency of the API server's response time.
   • CThe p95 latency of message delivery, measured from when the user sends a message to when the recipient receives it.
   • DThe p99 latency of the database queries.
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A video streaming service currently has an availability SLO of 99.9%. The product team wants to increase it to 99.99% to attract enterprise customers. The engineering team estimates that achieving the higher SLO would require a multi-region active-active architecture, doubling infrastructure costs and adding significant operational complexity. What should the team consider before committing to the new SLO?

   • AThe team should implement the higher SLO immediately because enterprise customers require it.
   • BThe cost of additional reliability should be compared with the expected revenue increase from enterprise customers.
   • CThe new SLO is always better because higher availability is always more valuable.
   • DThe team should keep the current SLO because any change is too risky.
   Reveal Solution Discussion Select an answer first