Download Alibaba Cloud ACA-Database.CertDumps.ACA-Database.2022-03-21.1e.15q.vcex

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Exam Alibaba Cloud ACA-Database
Number ACA-Database
File Name Alibaba Cloud ACA-Database.CertDumps.ACA-Database.2022-03-21.1e.15q.vcex
Size 13 Kb
Posted March 21, 2022
Downloads 4

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Demo Questions

Question 1
Which of the following statements is NOT correct about PolarDB?

  • A: ApsaraDB for PolarDB is a cloud-native relational database service that is compatible with the MySQL, PostgreSQL, and Oracle engines
  • B: Each ApsaraDB for PolarDB cluster supports up to 100 TB of storage space and can handle up to one million queries per second (QPS)
  • C: ApsaraDB for PolarDB can scale clusters within a few minutes, recover from failures within a few seconds, and guarantee data consistency
  • D: 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
  • E: ApsaraDB for PolarDB is designed to handle large amounts of sequential queries
Correct Answer: E
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?

  • A: DMS
  • B: DBS
  • C: DTS
  • D: DAS
  • E: ADAM
Correct Answer: A
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?

  • A: 1TB
  • B: 10TB
  • C: 50TB
  • D: 100TB
Correct Answer: D
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?

  • A: PolarDB MySQL
  • B: PolarDB PosgreSQL
  • C: PolarDB Oracle
  • D: PolarDB Box
Correct Answer: A
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?

  • A: Use the command line like 'mysql' to connect to a cluster
  • B: Use DMS to connect to a cluster
  • C: Use a client like HeidiSQL to connect to a cluster
  • D: Use PolarDB console to log into a cluster
Correct Answer: D
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?

  • A: Large storage space
  • B: Elastic scaling within minutes
  • C: When you add a read-only node in an ApsaraDB for PolarDB cluster, you only need to pay for computing resources
  • D: Millisecond-level latency in physical replication
  • E: locked backup
Correct Answer: E
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?

  • A: DMS
  • B: DBS
  • C: DTS
  • D: DAS
  • E: DG
Correct Answer: A
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?

  • A: DMS
  • B: DBS
  • C: DTS
  • D: DAS
  • E: ADAM
Correct Answer: C
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?

  • A: A PolarDB cluster contains one primary instance and up to 15 read-only instances
  • B: 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
  • C: Read/write splitting is enabled for PolarDB clusters by default, providing transparent, highly available, and self-adaptive load balancing for yourdatabase
  • D: 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
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.

  • A: True
  • B: False
Correct Answer: A
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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