Alibaba ACA-Developer Exam Practice Test Instant Access

Question 1

Which of the following are correct, regarding RAM users? (Number of correct answers: 3)

ARAM users can be created under a single Alibaba Cloud account, corresponding to employees, systems, or applications.

BRAM users do not 'own' the resources that they create (those belong to the Alibaba Cloud account itself), and RAM users cannot generate and pay their own individual bills (costs accrue to and are billed to the master Alibaba Cloud account).

CRAM users belong to an Alibaba Cloud account, but they can also operate as independent accounts with their own private resources, not visible to the primary Alibaba Cloud account.

DRAM users must be authorized by the Alibaba Cloud account to log in to the console or use the API to manage the resources owned by the Alibaba Cloud account.

Answer : A, C, D

Question 2

To meet data analytics requirements on large datasets, which of these databases can meet the demand for structured and semi-structured storage for almost all types of data, albeit with limited support for strong transactions?

AHBase

BOceanBase

CRDSMariaDB

DTSDB

Answer : C

Question 3

If a user finds that the Content Delivery Network (CDN) cache hit rate is low, what could be the reason? (Number of correct answers: 3)

AWhen the website has low traffic, the CDN will receive fewer requests and this will result in a lower cache hit rate.

BInsufficient bandwidth was selected when enabling the CDN service, causing the service capacity reach its limit too early.

CHTTP Header settings may cause cache misses.

DThe origin site has a large number of dynamic resources.

ECache configuration is inappropriate (ex. overly short Cache Expiry Time for popular files).

Answer : A, B, E

Question 4

You want to deploy a LAMP development environment in Alibaba Cloud's Singapore region, and you want to simultaneously bind a domain name and configure HTTPS. Which of these services can help you accomplish this quickly and easily?

AElastic Compute Service (ECS)

BElastic Container Instance (ECI)

CSimple Application Server (SAS)

DAlibaba Cloud Container Service for Kubernetes (ACK)

Answer : C

Question 5

A developer recently discovered that their company's application is beginning to suffer performance degradation as a result of increased user demand for the application. After some analysis, the major bottleneck is discovered to be the RDS database instance which hosts the company's databases, "A" and "B". The developer plans to use the DTS data migration solution to move one of the databases to a new RDS instance. Which of the following statements is correct? (Number of correct answers: 3)

AThe code for the application will have to be rewritten once this migration is complete.

BThe database account used for data migration must have read and write permissions. To ensure database security, please delete the database account used for data migration or reclaim related write permissions after data migration is completed.

CAfter disconnecting the connection between the source instance database B and the application, you need to log in to the source database B to check the session messages to ensure that no new sessions performed write operations.

DCreate a reverse data migration task and start it to migrate subsequent incremental data from target Instance database B to source instance database B.

Answer : A, B, C

Question 6

When using the Alibaba Cloud CLI, what is the default data format for responses, when executing queries such as "aliyun ecs Describelnstances"?

AJSON

BYAML

CXML

DTABLE

Answer : A

Question 7

Which of these are good ways to secure access to your API deployed on Alibaba Cloud API Gateway?

(Number of correct answers: 3)

AEnable API Gateway to connect to backend services in an Alibaba Cloud VPC network group. This guarantees the security of API requests.

BConfigure security keys for API Gateway.

CUse HTTPS to encrypt requests.

DUse OpenID Connect to authenticate requests.

EAllow only internal IP addresses to call the API.

Answer : A, C, E

Alibaba ACA-Developer ACA Developer Exam Practice Test