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Alibaba Cloud ACA-Developer Exam With Confidence Using Practice Dumps

Exam Code:
ACA-Developer
Exam Name:
ACA Developer Certification
Certification:
Alibaba Developer
Vendor:
Alibaba Cloud
Questions:
95
Last Updated:
Dec 1, 2025
Exam Status:
Stable
Alibaba Cloud ACA-Developer

ACA-Developer: Alibaba Developer Exam 2025 Study Guide Pdf and Test Engine

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ACA Developer Certification Questions and Answers

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Question 1

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)

Options:

A.

Add an index to a field that is frequently queried but does not frequently perform add, delete, or modify operations.

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.

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Question 2

Alibaba Cloud Log Service is a Pay-As-You-Go service. The billing unit is 7 day, and the configuration can be adjusted at any time: fees are charged according to actual usage. Which of the following are the main charges for Log Service? (Number of correct answers: 3)

Options:

A.

Read and write traffic

B.

Storage capacity

C.

Index traffic after index configuration

D.

Query analysis

Question 3

Which of the following statements about PolarDB's endpoint(s) is NOT correct?

Options:

A.

The endpoint of the PolarDB MySQL database includes the cluster endpoint and the primary endpoint.

B.

Through a cluster endpoint, applications can connect to data nodes.

C.

The primary endpoint supports read/write splitting.

D.

Cluster endpoints support read/write splitting.

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