Alibaba ACA-Operator Exam Questions Instant Access

Question 1

Which database utility is suitable for database migration?

ADMS

BDBS

CDTS

DDAS

Answer : C

https://www.alibabacloud.com/help/doc-detail/176063.htm

Question 2

In Alibaba Cloud, a developer finds that the ECS instance he created does not

have public IP assigned. The API method used was ''CreateInstance''. Which

of the following is the most likely reason?

AThe developer did not call AllocatePublicIpAdress (an additional API call), which is needed to assign a public IP

BThe CreateSecurityGroup API call was not made

CThe CreateDisk API call was not made

DThe ECS was not restarted after being created

Answer : A

https://www.alibabacloud.com/help/doc-detail/25544.htm

Question 3

Which of the following steps is NOT mandatory when creating an API through Alibaba Cloud API Gateway?

ADefine basic API information

BAttach a domain name

CDefine API Request parameters

DDefine the API backend service

Answer : B

https://www.alibabacloud.com/help/doc-detail/29478.htm

Question 4

Alibaba Cloud RocketMQ is typically used in scenarios where message publishing and consumption performance requirements are high. Which of the following are supported message types in Alibaba Cloud RocketMQ? (Number of correct answers: 3)

AScheduled message

BOrdered message

CBatched message

DTransactional message

ERetried message

Answer : A, B, D

Question 5

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)

AEvent Notifications can cross regions.

BMessage Service provides synchronous notification to ensure the consistency between the message acknowledgment and event processing.

CThe 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.

DThe consumer type of the event notification message can be HTTP Server, Queue, or Topic.

Answer : C, D

Question 6

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?

Answer : C

1-request, 2-load balancer, 3-authentication service, 4-billing service, 5- resource request

Question 7

If you have a Node.js based application and you plan to migrate it to Alibaba Cloud Function Compute, which of the following steps is unnecessary?

AManually install the Node.js in the Function Compute console

BCreate a single web application and upload the corresponding code package via the Function Compute console (or fcli)

CConfigure program startup commands and access ports in the Function Compute console

DStart and verify the application in the Function Compute console

Answer : A

https://www.alibabacloud.com/help/doc-detail/73329.htm

Alibaba ACA System Operator Certification ACA-Operator Exam Questions