Free Practice Alibaba ACA-Developer Exam Questions 2025

Stay ahead with 100% Free ACA Developer ACA-Developer Dumps Practice Questions

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Total 96 Questions | Updated On: Apr 08, 2025

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Question 1

For business scenarios with strong data reliability requirements or financial business scenarios with regulatory

requirements related to data durability and availability, RDS MySQL provides a remote backup mechanism to

improve reliability. Which of the following is correct, regarding RDS's remote disaster recovery capabilities?

(Number of correct answers: 3)

A : The primary database (the one to be backed up) must have an Alibaba Cloud Intranet address

B : RDS realizes real-time synchronization between the master instance and the remote disaster recoveryinstance through Data Transmission Service (DTS)

C : When an outage occurs in the area where the primary instance is located, and neither the primaryinstance (Master) nor the standby instance (Slave) can be connected to, the remote disaster recoveryinstance can be switched to the primary instance

D : When the database deletion operation is performed on the master instance, the operation will also besynchronized to the disaster recovery instance

Answer: D

Question 2

When you use SQL statements to access tables in a database without an index configured, a full table scan will

be performed. If a table contains a large amount of data, this kind of scan will access a large amount of data

and consume a lot of the database's resources. Which of the following options are best practices when creating

database indexes? (Number of correct answers: 3)

A : Add an index to a field that is frequently queried but does not frequently perform add, delete, or modifyoperations.

B : Applies indices to fields that contain many records.

C : table should not contain more than 6 indexed fields.

D : Apply indexing to fields of fixed length (preferably not long fields).

E : Adhere to the rightmost prefix principle when using composite indexes.

Answer: A,B,D

Question 3

The event monitoring feature in CIoudMonitor provides custom event monitoring functions. Which of the

following data reporting methods are included? (Number of correct answers: 3)

A : Report event monitoring through the Python SDK

B : Report event monitoring through the Java SDK

C : Report event monitoring data via HTTP

D : Report event monitoring data through the command line (CU)

Answer: A,B,C

Question 4

Which of the following web applications are suitable for deployment on Simple Application Server (SAS), as

compared with LCS? (Number of correct answers: 3)

A : Quickly build a personal blog website

B : Quickly build a small e-commerce website

C : Set up a NoSQL database service

D : Quickly build a personal, learning, or test environment

Answer: A,C

Question 5

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

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

C : No Internet IP address is configured for ECS-A.

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

Answer: C,D

Page: 1 / 20

Total 96 Questions | Updated On: Apr 08, 2025

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