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ACA-Database Practice Exam Questions and Answers

ACA Database Certification

Last Update 5 days ago
Total Questions : 80

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Question # 1

Which of the following are the advantages of cloud databases over self-managed databases? (Number of correct answers: 3)

Options:

A.  

Stronger service level agreement (SLA)

B.  

Integrated operations and maintenance (O&M), as well as easier management

C.  

High availability and comprehensive backup and monitoring capabilities

D.  

High costs

Discussion 0
Question # 2

You are using DTS to migrate from a MySQL database installed on an ECS instance to a target

database on RDS. In the DTS console, which of these is the correct "Instance Type" for the database?

Options:

A.  

ECS-based Databases

B.  

Express Connect DB

C.  

RDS Instance

D.  

ApsaraDB MongoDB

Discussion 0
Question # 3

Why is ApsaraDB for PolarDB better than other traditional database engines? (The number of answer: 3)

Options:

A.  

When you purchase a PolarDB cluster, you don't need to specify the storage capacity you want to purchase

B.  

PolarDB supports both OLTP and OLAP scenarios very well

C.  

The PolarDB database engine won't require you to replicate data when adding read-only nodes

D.  

ApsaraDB for PolarDB uses the pay-as-you-go billing method, therefore you only need to pay for the storage resources you actually use

Discussion 0
Question # 4

Which of the following architectures are supported by ApsaraDB for Redis Enhanced Edition (Tair)? (Number of correct answers: 3)

Options:

A.  

Master-replica architecture in which standard master-replica instances are deployed

B.  

Read/write splitting architecture in which standard master-replica instances are deployed

C.  

Cluster master-replica instances

D.  

Single-node architecture

Discussion 0
Question # 5

Data Management (DMS) provides features related to data warehouse development to support task orchestration and recurring scheduling. Which of the following features are being developed? (Number of correct answers: 3)

Options:

A.  

Data lineage

B.  

Data quality

C.  

Data visualization

D.  

Data directory

E.  

Data service

Discussion 0
Question # 6

Which of the following are the core technologies behind Database Backup Service? (Number of correct answers: 3)

Options:

A.  

Multi-cloud and multi-backend backup

B.  

Real-time synchronization

C.  

High mount speeds (a few seconds)

D.  

Online query and analysis

Discussion 0
Question # 7

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

Discussion 0
Question # 8

Which are the supported DB engine for PolarDB so far? (The number of Answer: 3)

Options:

A.  

PolarDB for Mysql

B.  

PolarDB for Postgres

C.  

PolarDB for SQLserver

D.  

PolarDB for Oracle

Discussion 0
Question # 9

You have a client that wants to move from another cloud provider's database service to RDS. Which of these is the best way to move their database to Alibaba Cloud?

Options:

A.  

Use DTS (Data Transmission Service)

B.  

Make a full physical backup of their database and copy it into OSS

C.  

This type of migration isn't possible

D.  

Migrate the entire VM hosting the database

Discussion 0
Question # 10

Which of the following types of data are most suitable for storage in MySQL databases?

Options:

A.  

Structured data in rows and columns

B.  

Document-oriented unstructured data

C.  

Large amounts of time series data

D.  

Key-value (KV) data that is frequently read and written

Discussion 0
Question # 11

Which of the following deployment architectures are supported by Alibaba Cloud ApsaraDB for MongoDB? (Number of correct answers: 3)

Options:

A.  

Standalone instance

B.  

Primary/secondary instance that consists of two nodes

C.  

Replica set instance that consists of three nodes

D.  

Sharded cluster instance

E.  

Replica set instance that consists of six nodes

Discussion 0
Question # 12

Alibaba Cloud DTS (Data Transmission Service) can only migrate between databases that are hosted

on RDS.

Options:

A.  

True

B.  

False

Discussion 0
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