Alibaba ACA-Database Exam Practice Test Instant Access

Question 1

Which of the following is the wrong statement about PolarDB design architecture?

AA PolarDB cluster contains one primary instance and up to 15 read-only instances

BPolarDB consolidate compute processes and storage processes in one box, allowing the database capacity to scale up and down to meet your
application needs in Alibaba Cloud

CRead/write splitting is enabled for PolarDB clusters by default, providing transparent, highly available, and self-adaptive load balancing for your
database

DHigh speed network connection is enabled between the DB server and the chunk server, and data are transferred using the Remote Direct Memory Access (RDMA) protocol

Answer : B

https://www.alibabacloud.com/help/doc-detail/58766.htm?spm=a2c63.p38356.b99.11.4e333181dMpFmV

Question 2

Suppose you are using MySQL currently, if you want to migrate to cloud native database PolarDB with little effort, which one is the best choice?

APolarDB MySQL

BPolarDB PosgreSQL

CPolarDB Oracle

DPolarDB Box

Answer : A

https://www.alibabacloud.com/help/doc-detail/58768.htm?spm=a2c63.l28256.b99.10.71ce3784cXj0y8

Question 3

What is the maximum storage size that PolarDB currently provides?

A1TB

B10TB

C50TB

D100TB

Answer : D

Question 4

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

AStandalone instance

BPrimary/secondary instance that consists of two nodes

CReplica set instance that consists of three nodes

DSharded cluster instance

EReplica set instance that consists of six nodes

Answer : A, C, D

Question 5

Which of the following are relational databases? (Number of correct answers: 5)

AOracle

BMySQL

CPostgreSQL

DMongoDB

EMariaDB

FRedis

GTSDB

HHBase

ISQL Server

Answer : A, B, C, E, I

Question 6

From which of the following data sources or databases can Data Lake Analytics (DLA) read data for analysis? (Number of correct answers: 6)

AMySQL

BOracle

COTS

DMongoDB

EAnolyticDB

FHOLO

GOSS

Answer : A, B, C, D, E, G

Question 7

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?

AFull backup and incremental backup

BFull backup only

CLogical migration tools

DIncremental backup only

Answer : C

Alibaba ACA-Database ACA Database Exam Practice Test