[Dec 06, 2021] Pass Alibaba Cloud ACA-Database Exam Info and Free Practice Test
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NEW QUESTION 11
Which migration modes are supported by DTS (Data Transmission Service)? (Number of correct answer: 3)
- A. From a different cloud provider to Alibaba Cloud
- B. From RDS to an ECS-based database
- C. From an RDS database, back to itself
- D. From Alibaba Cloud RDS to other database systems
Answer: A,B,D
Explanation:
Explanation
For database backup use DBS.
https://www.alibabacloud.com/help/doc-detail/59133.htm?spm=a2c63.l28256.b99.3.467e7530gZ9M6o
NEW QUESTION 12
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 Oracle
- B. PolarDB Box
- C. PolarDB PosgreSQL
- D. PolarDB MySQL
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/58768.htm?spm=a2c63.l28256.b99.10.71ce3784cXj0y8
NEW QUESTION 13
Which of the following is the high-availability service level that is specified in the ApsaraDB RDS Service Level Agreement (SLA)?
- A. 99%
- B. 99.99%
- C. 99.5%
- D. 90%
Answer: B
NEW QUESTION 14
Which of the following is NOT true, regarding the sensitive data management feature provided by Data Management (DMS)?
- A. Field-level and row-level permissions are supported.
- B. The rules of field metadata and data content can be automatically recognized.
- C. After you configure de-identification algorithms, you can view the de-identified data.
- D. De-identification algorithms can be managed. Multiple algorithms are supported, such as algorithms for masking specific positions and replacing fixed characters.
Answer: C
NEW QUESTION 15
What is the maximum number of read-only nodes in a PolarDB cluster?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 16
Which of the following types of data that is stored in PostgreSQL databases can support the one-to-many data model? (Number of correct answers: 3)
- A. String
- B. Cube
- C. GIS
- D. JSON
- E. JSONB
- F. Range
- G. Array
Answer: A,D,G
NEW QUESTION 17
What is the maximum storage size that PolarDB currently provides?
- A. 100TB
- B. 1TB
- C. 10TB
- D. 50TB
Answer: A
Explanation:
Explanation
Each PolarDB cluster supports to scale up to 100 TB. https://www.alibabacloud.com/product/polardb
NEW QUESTION 18
DTS (Data Transmission Service) must have access to a database user account on both the target and source database, in order to work.
- A. True
- B. False
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/26652.htm?spm=a2c63.p38356.879954.26.2ab232664Wkc2m#co
NEW QUESTION 19
Alibaba Cloud DTS (Data Transmission Service) can only migrate between databases that are hosted on RDS.
- A. True
- B. False
Answer: B
Explanation:
Explanation
Alibaba Cloud Data Transmission Service (DTS) helps you migrate data between data stores, such as relational databases, NoSQL databases, and data warehouses. You can use DTS to migrate your data to Alibaba Cloud or between combinations of cloud and on-premises data systems. .
https://www.alibabacloud.com/help/doc-detail/176063.htm?spm=a2c63.p38356.b99.6.2ef8c790WL4Jku
NEW QUESTION 20
Which of the following are the core technologies behind Database Backup Service? (Number of correct answers: 3)
- A. Online query and analysis
- B. High mount speeds (a few seconds)
- C. Real-time synchronization
- D. Multi-cloud and multi-backend backup
Answer: B,C,D
NEW QUESTION 21
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. Migrate the entire VM hosting the database
- D. This type of migration isn't possible
Answer: A
NEW QUESTION 22
Which are the supported DB engine for PolarDB so far? (The number of answer: 3)
- A. PolarDB for Postgres
- B. PolarDB for Oracle
- C. PolarDB for Mysql
- D. PolarDB for SQLserver
Answer: A,B,C
Explanation:
Explanation
PolarDB is a cloud-native relational database compatible with MySQL, PostgreSQL, and Oracle.
https://www.alibabacloud.com/product/polardb
NEW QUESTION 23
Which of the following specifications of AnalyticDB supports tiered storage of cold and hot data?
- A. Basic Edition
- B. C series
- C. S series
- D. Elastic Mode
Answer: D
NEW QUESTION 24
You are using DTS to migrate from a MySQL database installed on an ECS instance to a target database on RDS. In the DTS console, which of these is the correct "Instance Type" for the database?
- A. ECS-based Databases
- B. ApsaraDB MongoDB
- C. Express Connect DB
- D. RDS Instance
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/96154.htm?spm=a2c63.p38356.b99.118.59de5d1aWUVErx
NEW QUESTION 25
Which of the following features determines high performance of the performance-enhanced instances of ApsaraDB for Redis Enhanced Edition (Tair)?
- A. Data flashback
- B. Extended data structure modules
- C. Global Replica
- D. Multithreading
Answer: C
NEW QUESTION 26
Which of the following features are provided by PolarDB-O's proxy? (Number of correct answers: 4)
- A. Health checks for nodes
- B. Read/write splitting
- C. Failover strategies for high availability
- D. Load balancing
- E. Data encryption
Answer: A,B,C,D
NEW QUESTION 27
Data Management (DMS) provides features related to data warehouse development to support task orchestration and recurring scheduling. Which of the following features are being developed? (Number of correct answers: 3)
- A. Data quality
- B. Data directory
- C. Data lineage
- D. Data visualization
- E. Data service
Answer: A,C,E
NEW QUESTION 28
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