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 #11

What are the benefits of creating indexes on PolarDB? (Number of correct answers: 2)

A. Improve the efficiency of DML operations such as UPDATE.

B. Reduce invalid data scanning.

C. Improve the query efficiency SELECT statements.

D. Improve the efficiency of DDL operations.

Discussion 0

Correct Answer: B,C Vote an answer

Question #12

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?

A. Start and verify the application in the Function Compute console

B. Configure program startup commands and access ports in the Function Compute console

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

D. Manually install the Node. Js package in the Function Compute console

Discussion 0

Correct Answer: D Vote an answer

Question #13

You can use Alibaba Cloud Data transmission service (DTS) or the open source tool Redis-shake to migrate and synchronize data from a local Redis instance to an Alibaba Cloud Redis instance. What is one feature which DTS has but Redis-shake does not?

A. Two-way data synchronization

B. Full data migration

C. One-way data synchronization

D. Incremental data migration

Discussion 0

Correct Answer: B Vote an answer

Question #14

A developer is making the ModifyDDInstanceSpec API call to change the specifications of an RDS instance, but the operation fails. Why could this be? (Number of correct answers: 3)

A. The instance is in the running state

B. The instance has a backup task being executed

C. No instance type (specification) was included in the request parameters

D. The targeted RDS instance is a disaster recovery instance

Discussion 0

Correct Answer: A,B,C Vote an answer

Question #15

A developer have written a web application using a microservice architecture, in such a 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. 6

B. 5

C. 4

D. 3

Discussion 0

Correct Answer: D Vote an answer

Question #16

Company A has a large number of files store in Alibaba Cloud OSS that need to be deleted (numbering in the tens of thousands). What is the fastest, easiest way to delete these files?

A. Configure a life cycle rule that matches the entire bucket, and delete all files after one day

B. Directly delete the bucket

C. Manually delete them one by one

D. Call the API from a script, deleting files in batches

Discussion 0

Correct Answer: C Vote an answer

Question #17

A Developer is asked to implement a caching layer in front of RDS. Cached content is expensive to regenerate in case of service failure. Which implementation below would work while maintaining maximum uptime?

A. Migrate the ROS database to HBase to save the cache layer

B. Implement ApsaraDB for Redis in Standard Mode

C. Install Redis on an ECS instance

D. Implement ApsaraDB for Redis in Cluster Mode

Discussion 0

Correct Answer: A Vote an answer

Question #18

Function Compute supports one-way triggers and two-way triggers. Which of the following triggers is a one-way trigger? That is to say you only need to configure the trigger in the event source, not in Function Compute?.

A. CloudMonitor trigger(s)

B. OSS event trigger(s)

C. SLS trigger(s)

D. MNS topic trigger(s)

Discussion 0

Correct Answer: A Vote an answer

Question #19

What are the required parameters for the Python SDK to create a client to access Alibaba Cloud's API?
(Number of correct answers: 3)

A. regionjd

B. access.keyjd

C. vpcjd

D. access.key.secret

E. zone jd

Discussion 0

Correct Answer: A,B,D Vote an answer

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Question #20

Elastic Container instance (ECI) is an agile, secure, serverless service for running containers. If you need to configure public network access for ECI, which of these are reasonable solutions? (Number of correct answers: 3)

A. Specify a public IP address when creating the ECI.

B. Bind an Elastic IP (EIP) to the ECI instance.

C. Bind a NAT gateway and an EIP to the VPC to which the ECI belongs.

D. Configure ECI as a backend for a Server Load Balancer (SLB) that has a public IP address.

Discussion 0

Correct Answer: A,C,D Vote an answer

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