Alibaba Cloud ACA-DATABASE Online Practice Questions and Exam Preparation

Alibaba Cloud ACA-DATABASE Online Questions & Answers

• Question 31:

  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
  A. True

  ---

  Explanation/Reference:

  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

• Question 32:

  Your client is having trouble connecting DTS to their source database in their local datacenter, why might this be?

  A. Their database isn't on Alibaba Cloud already so it cannot be accessed by DTS
  B. Their database is not accessible from the Internet, so DTS cannot access it
  C. Their database must not include the special DTS compatibility mode
  D. Their database is an inverted column store, which is not supported
  B. Their database is not accessible from the Internet, so DTS cannot access it

• Question 33:

  Which of the following features is provided by Data Management (DMS)?

  A. Integrates data across multiple data sources
  B. Backs up multiple types of databases
  C. Evaluates the database migration project
  D. Enables online database management, such as data query, database and table management, and permission management
  C. Evaluates the database migration project

• Question 34:

  Which of the following is NOT supported by schema migration in Advanced Database and Application Migration (ADAM)?

  A. Re-migrate all schemas
  B. Re-migrate the failed schemas
  C. Migrate the schemas that require a manual revision but have not been revised
  D. Customize schema migration
  C. Migrate the schemas that require a manual revision but have not been revised

• Question 35:

  When high availability switchovers occur in a database, which of the following features provided by ApsaraDB RDS for PostgreSQL can prevent the incremental data loss of logical subscriptions?

  A. Ganos
  B. Pase
  C. Slot failover
  D. High concurrency optimization
  E. Point-in-time restore
  E. Point-in-time restore

• Question 36:

  Which of the following statements about Data Management (DMS) permissions management is NOT true?

  A. You can assign different resources and operation permissions to an Alibaba Cloud account as needed.
  B. You must create different database accounts for each Alibaba Cloud account.
  C. You cannot directly submit changes even if you have permissions to make changes.
  D. The permissions of the accounts of resigned or transferred personnel can be automatically managed by using OpenAPI.
  C. You cannot directly submit changes even if you have permissions to make changes.

• Question 37:

  Which of the following are the advantages of cloud databases over self-managed databases? (Number of correct answers: 3)

  A. Stronger service level agreement (SLA)
  B. Integrated operations and maintenance (OandM), as well as easier management
  C. High availability and comprehensive backup and monitoring capabilities
  D. High costs
  A. Stronger service level agreement (SLA)
  B. Integrated operations and maintenance (OandM), as well as easier management
  C. High availability and comprehensive backup and monitoring capabilities

• Question 38:

  Which of the following are the core technologies behind Database Backup Service? (Number of correct answers: 3)

  A. Multi-cloud and multi-backend backup
  B. Real-time synchronization
  C. High mount speeds (a few seconds)
  D. Online query and analysis
  A. Multi-cloud and multi-backend backup
  B. Real-time synchronization
  C. High mount speeds (a few seconds)

• Question 39:

  Which of the following tasks cannot be completed by using Advanced Database and Application Migration (ADAM)?

  A. De-Oracle workload evaluation
  B. Data structure conversion
  C. Data migration
  D. Performance monitoring
  B. Data structure conversion

• Question 40:

  Which of the following is the most efficient backup in ApsaraDB for MongoDB?

  A. Logical backup
  B. Physical backup
  C. Snapshot backup
  D. Full backup
  B. Physical backup