Free ACA Database Exam ACA-Database Exam Practice Test

From which of the following data sources or databases can Data Lake Analytics (DLA) read data for analysis? (Number of correct answers: 6)

• MySQL
  
• Oracle
  
• OTS
  
• MongoDB
  
• AnolyticDB
  
• HOLO
  
• OSS
  

Which type of the following logs is used to synchronize data between primary and secondary databases in RDS for MySQL?

• Redo log
  
• Rollback log
  
• Binary log
  
• Error log
  

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
  

Alibaba Cloud DTS (Data Transmission Service) is a file migration tool.

• True
  
• False
  

Which are the supported DB engine for PolarDB so far? (The number of Answer: 3)

• PolarDB for Mysql
  
• PolarDB for Postgres
  
• PolarDB for SQLserver
  
• PolarDB for Oracle
  

Which of the following statements about Alibaba Cloud ApsaraDB for MongoDB is true?

• It takes a longer time to perform operations and maintenance (O&M) on ApsaraDB for MongoDB instances than on self-installed and self-managed MongoDB.
  
• DataWorks is not supported for MongoDB data processing.
  
• Alibaba Cloud and MongoDB have a strategic partnership, so Alibaba Cloud Is able to provide the latest MongoDB features in our ApsaraDB for MongoDB product, in all our global regions.
  

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?

• Ganos
  
• Pase
  
• Slot failover
  
• High concurrency optimization
  
• Point-in-time restore
  

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

• Large storage space
  
• Elastic scaling within minutes
  
• When you add a read-only node in an ApsaraDB for PolarDB cluster, you only need to pay for computing resources
  
• Millisecond-level latency in physical replication
  
• locked backup
  

Which of the following is not a component of the PolarDB-0 architecture in Apsara Stack?

• FC Switch
  
• SAN
  
• Proxy
  
• RDMA
  

Which of the following is NOT true, regarding the sensitive data management feature provided by Data Management (DMS)?

• The rules of field metadata and data content can be automatically recognized.
  
• De-identification algorithms can be managed. Multiple algorithms are supported, such as algorithms for masking specific positions and replacing fixed characters.
  
• Field-level and row-level permissions are supported.
  
• After you configure de-identification algorithms, you can view the de-identified data.