[2022] ACA-Database.pdf – Questions Answers PDF Sample Questions Reliable [Q48-Q65]

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[2022] ACA-Database.pdf – Questions Answers PDF Sample Questions Reliable

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NO.48 Which of the following is NOT true, regarding DTS (Database Transmission Service)?

DTS cannot be used for incremental database synchronization

DTS supports multiple database engines

DTS can migrate both data and table schema

DTS works for database both on and off Alibaba Cloud

Explanation
https://www.alibabacloud.com/help/doc-detail/56776.htm?spm=a2c63.p38356.b99.181.74896b5dro6cDo

NO.49 Which of the following are the advantages of cloud databases over self-managed databases? (Number of correct answers: 3)

Stronger service level agreement (SLA)

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

High availability and comprehensive backup and monitoring capabilities

High costs

NO.50 How can ApsaraDB for MyBase solve problems in database security and performance interferences in the multi-tenant scenario?

ApsaraDB for MyBase supports resource over commitment.

Instances can be migrated. You can manually migrate instances to idle hosts.

Isolated hosts are used. A host runs only your instances and does not run instances of other users.

ApsaraDB for MyBase allows you to distribute different types of instances at a time.

NO.51 If you have a development team with several developers working on cloud databases, which product is recommended to use for development collaboration?

DMS

DBS

DTS

DAS

Explanation
A series of step-based solutions for R&D processes, data security, and data development are provided in the Data Management (DMS) console to get you started with DMS.
https://www.alibabacloud.com/help/doc-detail/190124.htm?spm=a2c63.p38356.b99.40.6ad93d19Xe9h14

NO.52 Alibaba Cloud DTS (Data Transmission Service) is a file migration tool.

True

False

Explanation
DTS is a data migration, integration, synchronization and change tracking tool.
https://www.alibabacloud.com/help/doc-detail/176063.htm?spm=a2c63.l28256.b99.6.490d7142CiFvPb

NO.53 Which of the following features are provided by PolarDB-O’s proxy? (Number of correct answers: 4)

Read/write splitting

Load balancing

Health checks for nodes

Failover strategies for high availability

Data encryption

NO.54 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

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

NO.55 Which of the following specifications of AnalyticDB supports tiered storage of cold and hot data?

Basic Edition

C series

S series

Elastic Mode

NO.56 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.

NO.57 Which of the following features is NOT supported by Data Transmission Service (DTS)?

Data migration

Data synchronization

Data backup

Change tracking

NO.58 Which database utility is used for data migration and synchronization?

DMS

DBS

DTS

DAS

ADAM

Explanation
Data Transmission Service is charged based according to three models: Data Synchronization, Data Migration, Change Tracking. https://www.alibabacloud.com/product/data-transmission-service/pricing

NO.59 Which of the following statements is NOT correct about PolarDB?

ApsaraDB for PolarDB is a cloud-native relational database service that is compatible with the MySQL, PostgreSQL, and Oracle engines

Each ApsaraDB for PolarDB cluster supports up to 100 TB of storage space and can handle up to one million queries per second (QPS)

ApsaraDB for PolarDB can scale clusters within a few minutes, recover from failures within a few seconds, and guarantee data consistency

An ApsaraDB for PolarDB cluster can also be scaled out to a maximum of 16 nodes, and provide up to 6 times of performance improvement traditional MySQL clusters at a 30% to 50% cost reduction

ApsaraDB for PolarDB is designed to handle large amounts of sequential queries

Explanation
PolarDB is 6 times faster than standard MySQL database in handling large amounts of concurrent queries.
https://www.alibabacloud.com/product/polardb

NO.60 With ApsaraDB for MyBase, problems caused by a sudden spike in traffic are automatically resolved. How is this done?

ApsaraDB for My Base allows you to deploy different types of instances in a cluster.

ApsaraDB for MyBase grants you host permissions. You can log on to hosts to troubleshoot business problems in an emergency.

ApsaraDB for MyBase supports the over commitment of CPU and disk resources.

ApsaraDB for MyBase supports elastic upgrade policies. If the resource utilization of a database exceeds the preset threshold during a business peak, ApsaraDB for MyBase can automatically upgrade database resource specifications to respond to the business peak.

ApsaraDB for MyBase allows you to specify a host when you create an instance.

NO.61 Alibaba Cloud DTS (Database Transmission Service) only supports MySQL databases.

True

False

Explanation
https://www.alibabacloud.com/help/doc-detail/26618.htm?spm=a2c63.p38356.b99.53.1c2b1156hNo8v0

NO.62 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?

Use DTS (Data Transmission Service)

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

This type of migration isn’t possible

Migrate the entire VM hosting the database

NO.63 PolarDB for MySQL uses shared distributed storage and supports dual-zone deployment by default. How many data replicas are available across the two zones?

NO.64 Which migration modes are supported by DTS (Data Transmission Service)? (Number of correct answer: 3)

From Alibaba Cloud RDS to other database systems

From RDS to an ECS-based database

From a different cloud provider to Alibaba Cloud

From an RDS database, back to itself

Explanation
For database backup use DBS.
https://www.alibabacloud.com/help/doc-detail/59133.htm?spm=a2c63.l28256.b99.3.467e7530gZ9M6o

NO.65 Which of these are NOT good use cases for DTS (Data Transmission Service)? (Number of correct answers: 2)

Incremental synchronization for disaster recovery

Full database synchronization for database migration

Undoing changes made to a database by mistake

Saving database logs

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[2022] ACA-Database.pdf – Questions Answers PDF Sample Questions Reliable [Q48-Q65]

April 24, 2022

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[2022] ACA-Database.pdf – Questions Answers PDF Sample Questions Reliable [Q48-Q65]

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