In the topology diagram of Huawei Cloud Application Performance Management Service, each arrow connection represents a call relationship. Different colors represent the Apdex health of the call relationship. The red dotted arrow line shown in the following figure indicates that the call is ()

The voice recognition service used in the smart outbound scenario is real-time voice recognition.

On the topological map of HUAWEI CLOUD application operation and maintenance, different colors represent the health of the instance, and the color is determined by the Apdex value.
If the instance color is gray, what does it represent?

Which cloud service in the HUAWEI CLOUD HCS Online hybrid cloud solution can achieve cross-AZ disaster recovery: RPO=0 and RTO<30min?

Which of the following options are the challenges facing the microservice architecture? (Multiple choice)