ACA-Database Practice Exam Questions and Answers

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

A.  

ECS-based Databases

B.  

Express Connect DB

C.  

RDS Instance

D.  

ApsaraDB MongoDB

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

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

A.  

Data lineage

B.  

Data quality

C.  

Data visualization

D.  

Data directory

E.  

Data service

A.  

Multi-cloud and multi-backend backup

B.  

Real-time synchronization

C.  

High mount speeds (a few seconds)

D.  

Online query and analysis

A.  

True

B.  

False

A.  

PolarDB for Mysql

B.  

PolarDB for Postgres

C.  

PolarDB for SQLserver

D.  

PolarDB for Oracle

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

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