Alibaba Cloud ACA-Developer Actual Free Exam Questions & Community Discussion

Exam Code/Number: ACA-Developer
Exam Name/Title: ACA Developer Certification
Certification Provider: Alibaba Cloud
Corresponding Certification: Alibaba Developer

Exam Questions: 97
Updated On: May 30, 2026

Question #21

A developer creates a MySQL database service on a Linux ECS instance (ECS-A), and wants to access this database service from another instance (ECS-B) in the same VPC using the private IP address bound to the ECS instance, however, the connection can't be established. What could cause this? (Number of correct answers: 2)

A. The built-in firewall on ECS-A has rules that prohibit external access to the MySQL service port.

B. No Internet IP address is configured for ECS-A.

C. The bind-address parameter set in the my.ini configuration file of the MySQL service is commented out.

D. The security group for ECS-A does not have the default MySQL service port open.

Discussion 0

Correct Answer: B,C Vote an answer

Question #22

A Developer is creating a Function Compute function. This function requires around 1 GB of temporary storage for files while executing. These files will not be needed after the function is completed for a fixed period. How can this developer MOST efficiently handle the temporary files?

A. Store the files in the /tmp directory on a temporary ECS instance, and delete the files at when the Function Compute function call completes.

B. Store the files in Cloud Disk and delete the files when Function Compute function call completes.

C. Copy the files to NFS and delete the files when the Function Compute function call completes.

D. Copy the files to an OSS bucket with a lifecycle policy configured to delete the files automatically.

Discussion 0

Correct Answer: A Vote an answer

Question #23

A developer was sending a request to Key Management Service (KMS) through the KMSAPI interface, and found that the key management service cannot be accessed. What is a possible reason?

A. The user key master key is in PendingDeletion state

B. The user key master key is in Pendinglmport state

C. User key master key is in Disabled state

D. The HTTPS protocol is not enabled

Discussion 0

Correct Answer: A Vote an answer

Question #24

In Alibaba Cloud RocketMQ, messages are kept for up to _____ days. We recommend configuring a monitoring service to watch the consumption status, and intervene manually when ''not consumed but to be deleted'' message alarms occur.

A. 2

B. 5

C. 4

D. 3

Discussion 0

Correct Answer: D Vote an answer

Question #25

Which
of the following parameter locations should be specified for the parameter of key1 where the request URL is in the form: http://somesite.com/test?key1 =[value1] ?

A. HTTP Header

B. Parameter Path

C. Query

D. HTTP Body

Discussion 0

Correct Answer: B Vote an answer

Question #26

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

A. JSON

B. XML

C. YAML

D. TABLE

Discussion 0

Correct Answer: A Vote an answer

Question #27

A certain project of Enterprise A (called Project-X) moves to the cloud and will need to use a variety of s Alibaba Cloud resources, such as ECS instances, RDS instances, SLB instances, and OSS storage space. There are multiple employees on the project who need to operate these cloud resources. Because each employee has different job responsibilities and requires different permissions, what is the WRONG approach to resource management?

A. Create RAM users each employee, and set login passwords or create AccessKey credentials as needed

B. Use system policies to bind reasonable permissions policies to users or user groups, and customize policies for more fine-grained control

C. When there are multiple RAM users under a cloud account, create user groups to classify and authorize RAM users with the same responsibilities

D. When creating RAM for users, give each user both web console AND AccessKey credentials: there is no need to keep these separate

Discussion 0

Correct Answer: A Vote an answer

Question #28

Which of these are suitable use cases for Alibaba Cloud's MongoDB service? (Number of correct answers: 3)

A. Applications requiring high OPS, such as logging apps

B. Applications where JSON is a good choice of storage format

C. Applications requiring geo-location queries, such as logistics or order status apps

D. Scenarios where complex transaction support is required

Discussion 0

Correct Answer: A,C,D Vote an answer

Question #29

What migration features does Alibaba Cloud SMC (Server Migration Center) support? (Number of correct answers: 3)

A. Supports all versions Microsoft Windows

B. Supports incremental data migration

C. Supports migration to Container Registry

D. Supports migration from virtual machines to physical machines

E. Supports batch migration

Discussion 0

Correct Answer: B,C,E Vote an answer

Question #30

Which of the following cloud services can be integrated with Alibaba Cloud KMS (Key Managed Service)?
(Number of correct answers: 3)

A. Relational Database Service (RDS)

B. Elastic Compute Service (ECS)

C. Server Load Balancer (SLB)

D. Object Storage Service (OSS)

Discussion 0

Correct Answer: A,B,D Vote an answer

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