Online Access Free ACA-Operator Practice Test

A developer has written a web application using a microservice architecture, in such an architecture, the client (web browser or mobile application) first initiates a request. The request first reaches the load balancer, then goes through an authentication service, a billing service, then requests a resource, and finally a result is returned. How many spans does such a call chain consist of?

• A.3
• B.4
• C.5
• D.6

You can create an event notification rule in Message Service and push notifications to the specified consumer in the form of messages, to receive events from specified Alibaba Cloud resources. Which of the following options are correct statements about the Message Service (MS) service? (Number of correct answers: 2)

• A.Message Service provides synchronous notification to ensure the consistency between the message acknowledgment and event processing.
• B.The consumer type of the event notification message can be HTTP Server, Queue, or Topic.
• C.The event notification message is retained within the valid time. When you fail to receive an event message, the event notification message is retained based on the specified retry policy.
• D.Event Notifications can cross regions.

Which of the following is NOT required for SMC (Server Migration Center) to migrate a server to Alibaba Cloud?

• A.From the SMC console, configure the type of disk image to be generated during the migration
• B.The SMC backend service generates a target Alibaba Cloud image based on the migration source
• C.The SMC client transfers the source data to an intermediate ECS instance
• D.Import the migration source information to the SMC console

Which command is used to get the Docker daemon information?

• A.docker version
• B.docker image
• C.docker info
• D.docker pull

Which of these services can be used to monitor Alibaba Cloud resources and send alerts? (Number of correct answers: 3)

• A.Cloud Config
• B.ActionTrail
• C.CloudMonitor
• D.Object Storage Service (OSS)