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ACA-Database ACA Database Certification Questions and Answers

Questions 4

What is the maximum storage size that PolarDB currently provides?

Options:

A.

1TB

B.

10TB

C.

50TB

D.

100TB

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Questions 5

Which of the following tools can be used to migrate an on-premises database to Alibaba Cloud while causing minimal service downtime?

Options:

A.

pg_dump

B.

pg_restore

C.

pg_upgrade D.DTS

D.

pg_basebackup

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Questions 6

You need to migrate a database that has a storage capacity of 50 GB to the cloud and can tolerate a service downtime of half an hour. In this case, which of the following migration methods is the optimal choice to migrate data to the cloud in terms of stability and availability?

Options:

A.

Full backup and incremental backup

B.

Full backup only

C.

Logical migration tools

D.

Incremental backup only

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Questions 7

Which of the following are the benefits of database views? (Number of correct answers: 3)

Options:

A.

Simplicity for queries

B.

Simplicity in structure: presents the database as a set of virtual tables specific to particular users or groups of users

C.

Easier for data visualization

D.

Stabilization of information: presents a consistent, unchanged image of the database structure

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Questions 8

Which of the following statements about the compatibility of AnalyticDB for PostgreSQL is NOT true?

Options:

A.

Support for the Java Database Connectivity (JDBC) protocol

B.

Support for the SQL2003 syntax standard

C.

Compliance with PostgreSQL and Greenplum protocols

D.

Fully compatible with Oracle syntax

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Questions 9

PolarDB for MySQL allows you to deploy a cluster across multiple zones. Compared with single-zone clusters, multi-zone clusters have better disaster recovery capabilities and can withstand data centre-level faults.

Options:

A.

True

B.

False

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Questions 10

Alibaba Cloud DTS (Data Transmission Service) supports both full database migration and incremental synchronization.

Options:

A.

True

B.

False

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Questions 11

Which of the following statements about MongoDB is NOT true?

Options:

A.

MongoDB is a relational database.

B.

MongoDB is a document database.

C.

MongoDB supports transactions.

D.

MongoDB can be deployed in cluster mode.

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Questions 12

Which of the following types of data that is stored in PostgreSQL databases can support the one-to-many data model? (Number of correct answers: 3)

Options:

A.

JSON

B.

Array

C.

String

D.

Cube

E.

Range

F.

JSONB

G.

GIS

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Exam Code: ACA-Database
Exam Name: ACA Database Certification
Last Update: Nov 21, 2024
Questions: 80
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