ACA Database Certification Exam Alibaba Cloud ACA-Database Exam Questions

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1. Which of the following features determines high performance of the performance-enhanced instances of ApsaraDB for Redis Enhanced Edition (Tair)?

Extended data structure modules

Multithreading

Global Replica

Data flashback

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2. Which of the following is the lowest recovery point objective (RPO) for Database Backup Service?

Seconds

Minutes

Hours

Days

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3. If a database exception occurs in a PolarDB cluster because important data is deleted by mistake, how i can data be restored?

Level-2 backup + Redo log

Level 1 backup + Redo log

Level-2 backup

Level-1 backup

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4. 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?

ECS-based Databases

Express Connect DB

RDS Instance

ApsaraDB MongoDB

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5. Which database utility is used for data migration and synchronization?

DMS

DBS

DTS

DAS

ADAM

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6. Which of the following statements about MongoDB is NOT true?

MongoDB is a relational database.

MongoDB is a document database.

MongoDB supports transactions.

MongoDB can be deployed in cluster mode.

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7. Which of the following is the high-availability service level that is specified in the ApsaraDB RDS Service Level Agreement (SLA)?

90%

99%

99.5%

99.99%

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

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

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

Cluster master-replica instances

Single-node architecture

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9. 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?

PolarDB MySQL

PolarDB PosgreSQL

PolarDB Oracle

PolarDB Box

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