Alibaba ACA-Operator Exam Practice Test Instant Access

Question 1

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 2

Your company decided to replicate the whole cloud environment in another

region and use it as a cross-region failover in disaster recovery scenarios.

Your current environment includes Elastic Compute Service (ECS) instances,

Server Load Balancer (SLB) instances and Relational Database Service

(RDS) instances. Which of the following statements is correct?

AYou can provision multiple ECS instances in multiple regions, thereby leveraging automatic high availability across regions

BYou can provision multiple SLB instances in multiple regions, thereby leveraging automatic high availability across regions

CYou can use DNS to resolve domain names to the IP addresses of multiple ECS instances running in different regions

DYou can use DNS to resolve domain names to the IP addresses of multiple SLB instances running in different regions

Answer : D

https://cloudacademy.com/course/alibaba-server-load-balancer- 1066/alibabas-high-availability/

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

A developer accesses logs in a Log Service Logstore via the API. The error code returned by the server is 404. Which of these could be the cause?

AThe log project (Project) does not exist

BThe requested digital signature does not match

CServer internal error

DServer is busy: please try later

Answer : A

Error 404 ProjectNotExist: The error message returned because the specified project does not exist. https://www.alibabacloud.com/help/doc-detail/29018.htm

Question 5

A company is developing a music application based on OSS and ECS, their users can download mp3 files after signing up for the application. Recently, the public network traffic to the OSS has doubled but the increase of registered users is less than 10%. After in-depth analysis, system operators find that many download requests are requested from the external search engine. In this case, which of the following measures is thought to be able to address this issue?

AMigrate music files from the OSS to the data disks for ECS instances

BChange the website access mode to HTTPS

CEnable ''Hotlink protection'' of OSS and use an HTTP Referer whitelist to prevent unauthorized users from accessing your data

DUse SLB for extra protection

Answer : D

You can configure a HTTP Referer whitelist for a bucket to prevent extra fees

caused by unauthorized access to the bucket.

https://www.alibabacloud.com/help/doc-detail/31901.htm

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-Operator ACA System Operator Certification Exam Practice Test