Alibaba Alibaba Certifications ACA-DATABASE Questions & Answers

• Question 31:

  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?

  A. Use DTS (Data Transmission Service)

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

  C. This type of migration isn't possible

  D. Migrate the entire VM hosting the database

  Correct Answer: A

• Question 32:

  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

  Correct Answer: E

• Question 33:

  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 RandD 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/docdetail/190124.htm?spm=a2c63.p38356.b99.40.6ad93d19Xe9h14

• Question 34:

  Alibaba Cloud DTS (Database Transmission Service) only supports MySQL databases.

  A. True

  B. False

  Correct Answer: B

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

• Question 35:

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

  A. FC Switch

  B. SAN

  C. Proxy

  D. RDMA

  Correct Answer: B

• Question 36:

  Which of the following scheduling tools are supported by AnalyticDB for MySQL? (Number of correct answers: 2)

  A. DMS

  B. Data Works

  C. MaxCompute

  D. QuickBl

  Correct Answer: AB

• Question 37:

  Which of the following features is NOT supported by Data Transmission Service (DTS)?

  A. Data migration

  B. Data synchronization

  C. Data backup

  D. Change tracking

  Correct Answer: D

• Question 38:

  What does DIM mean in data warehouse terms?

  A. Dimension table

  B. Operational data store (ODS)

  C. Common data model (CDM)

  D. Application data service (ADS)

  Correct Answer: A

• Question 39:

  Why is ApsaraDB for PolarDB better than other traditional database engines? (The number of answer: 3)

  A. When you purchase a PolarDB cluster, you don't need to specify the storage capacity you want to purchase

  B. PolarDB supports both OLTP and OLAP scenarios very well

  C. The PolarDB database engine won't require you to replicate data when adding read-only nodes

  D. ApsaraDB for PolarDB uses the pay-as-you-go billing method, therefore you only need to pay for the storage resources you actually use

  Correct Answer: ACD

  Kernel Features: OLTP performance. https://www.alibabacloud.com/help/doc-detail/172293.htm?spm=a2c63.p38356.b99.81.101b333ePsD0YF

• Question 40:

  PolarDB for MySQL uses shared distributed storage and supports dual-zone deployment by default. How many data replicas are available across the two zones?

  A. 3

  B. 4

  C. 5

  D. 6

  Correct Answer: D