Download Alibaba.ACA-Database.CertDumps.2022-03-21.15q.vcex

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Exam Alibaba Cloud ACA-Database
Number ACA-Database
File Name Alibaba.ACA-Database.CertDumps.2022-03-21.15q.vcex
Size 13 KB
Posted Mar 21, 2022
Download Alibaba.ACA-Database.CertDumps.2022-03-21.15q.vcex

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Demo Questions

Question 1

Which of the following statements is NOT correct about PolarDB?


  1. ApsaraDB for PolarDB is a cloud-native relational database service that is compatible with the MySQL, PostgreSQL, and Oracle engines
  2. Each ApsaraDB for PolarDB cluster supports up to 100 TB of storage space and can handle up to one million queries per second (QPS)
  3. ApsaraDB for PolarDB can scale clusters within a few minutes, recover from failures within a few seconds, and guarantee data consistency
  4. 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
  5. ApsaraDB for PolarDB is designed to handle large amounts of sequential queries
Correct answer: E
Explanation:
PolarDB is 6 times faster than standard MySQL database in handling large amounts of concurrent queries. https://www.alibabacloud.com/product/polardb
PolarDB is 6 times faster than standard MySQL database in handling large amounts of concurrent queries. https://www.alibabacloud.com/product/polardb



Question 2

Which database utility is good for database management and DevOps?


  1. DMS
  2. DBS
  3. DTS
  4. DAS
  5. ADAM
Correct answer: A
Explanation:
Database DevOps Solutions. https://www.alibabacloud.com/product/data-management-service / https://www.alibabacloud.com/help/doc-detail/190124.htm?spm=a2c63.p38356.b99.40.6ad93d19Xe9h14
Database DevOps Solutions. https://www.alibabacloud.com/product/data-management-service / https://www.alibabacloud.com/help/doc-detail/190124.htm?spm=a2c63.p38356.b99.40.6ad93d19Xe9h14



Question 3

What is the maximum storage size that PolarDB currently provides?


  1. 1TB
  2. 10TB
  3. 50TB
  4. 100TB
Correct answer: D
Explanation:
Each PolarDB cluster supports to scale up to 100 TB. https://www.alibabacloud.com/product/polardb
Each PolarDB cluster supports to scale up to 100 TB. https://www.alibabacloud.com/product/polardb



Question 4

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?


  1. PolarDB MySQL
  2. PolarDB PosgreSQL
  3. PolarDB Oracle
  4. PolarDB Box
Correct answer: A
Explanation:
https://www.alibabacloud.com/help/doc-detail/58768.htm?spm=a2c63.l28256.b99.10.71ce3784cXj0y8
https://www.alibabacloud.com/help/doc-detail/58768.htm?spm=a2c63.l28256.b99.10.71ce3784cXj0y8



Question 5

Which of the followings is NOT a correct way to connect to PolarDB?


  1. Use the command line like 'mysql' to connect to a cluster
  2. Use DMS to connect to a cluster
  3. Use a client like HeidiSQL to connect to a cluster
  4. Use PolarDB console to log into a cluster
Correct answer: D
Explanation:
Use the PolarDB console to log on to Database. https://www.alibabacloud.com/help/doc-detail/68511.htm?spm=a2c63.p38356.879954.7.7c2855b1aLLHjb#task-1580301
Use the PolarDB console to log on to Database. https://www.alibabacloud.com/help/doc-detail/68511.htm?spm=a2c63.p38356.879954.7.7c2855b1aLLHjb#task-1580301



Question 6

Which of the following statements is NOT correct about the benefits you can gain through PolarDB?


  1. Large storage space
  2. Elastic scaling within minutes
  3. When you add a read-only node in an ApsaraDB for PolarDB cluster, you only need to pay for computing resources
  4. Millisecond-level latency in physical replication
  5. locked backup
Correct answer: E
Explanation:
Lock-free backup. https://www.alibabacloud.com/help/doc-detail/58768.htm?spm=a2c63.p38356.b99.10.1bcb7338k86bX5
Lock-free backup. https://www.alibabacloud.com/help/doc-detail/58768.htm?spm=a2c63.p38356.b99.10.1bcb7338k86bX5



Question 7

If you have a development team with several developers working on cloud databases, which product is recommended to use for development collaboration?


  1. DMS
  2. DBS
  3. DTS
  4. DAS
  5. DG
Correct answer: A
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
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



Question 8

Which database utility is used for data migration and synchronization?


  1. DMS
  2. DBS
  3. DTS
  4. DAS
  5. ADAM
Correct answer: C
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
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



Question 9

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


  1. A PolarDB cluster contains one primary instance and up to 15 read-only instances
  2. PolarDB consolidate compute processes and storage processes in one box, allowing the database capacity to scale up and down to meet yourapplication needs in Alibaba Cloud
  3. Read/write splitting is enabled for PolarDB clusters by default, providing transparent, highly available, and self-adaptive load balancing for yourdatabase
  4. High 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
Correct answer: B
Explanation:
PolarDB decouples compute from storage. https://www.alibabacloud.com/help/doc-detail/58766.htm?spm=a2c63.p38356.b99.11.4e333181dMpFmV
PolarDB decouples compute from storage. https://www.alibabacloud.com/help/doc-detail/58766.htm?spm=a2c63.p38356.b99.11.4e333181dMpFmV



Question 10

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.


  1. True
  2. False
Correct answer: A
Explanation:
Compared with single-zone clusters, multi-zone clusters can enhance disaster recovery capabilities and withstand the breakdown of an entire data center. https://www.alibabacloud.com/help/doc-detail/122182.htm?spm=a2c63.p38356.879954.4.6f2fa25362cz60#task-1580301
Compared with single-zone clusters, multi-zone clusters can enhance disaster recovery capabilities and withstand the breakdown of an entire data center. https://www.alibabacloud.com/help/doc-detail/122182.htm?spm=a2c63.p38356.879954.4.6f2fa25362cz60#task-1580301









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