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Alibaba Cloud ACA-Database Exam Syllabus Topics:
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NEW QUESTION 38
Which of these are NOT good use cases for DTS (Data Transmission Service)? (Number of correct answers: 2)
- A. Saving database logs
- B. Full database synchronization for database migration
- C. Incremental synchronization for disaster recovery
- D. Undoing changes made to a database by mistake
Answer: A,D
NEW QUESTION 39
Each PolarDB cluster consists of one primary node and one or more read-only nodes. The system only support manually switch over services from the primary node to a read-only node.
- A. False
- B. True
Answer: A
Explanation:
Explanation
PolarDB cluster supports Manually and Automatically switch over services between primary and read-only nodes.
https://www.alibabacloud.com/help/doc-detail/141229.htm?spm=a2c63.p38356.b99.113.36df231dK2DVX0
NEW QUESTION 40
Which of the following computing capabilities are supported by AnalyticDB? (Number of correct answers: 4)
- A. Real-time update
- B. Interactive analysis
- C. Complex extract, transform, load (ETL)
- D. Machine Learning
- E. Simple point query
Answer: A,B,C,D
NEW QUESTION 41
Which of the following is not a component of the PolarDB-0 architecture in Apsara Stack?
- A. RDMA
- B. FC Switch
- C. Proxy
- D. SAN
Answer: D
NEW QUESTION 42
Which of the following is the high-availability service level that is specified in the ApsaraDB RDS Service Level Agreement (SLA)?
- A. 99.99%
- B. 90%
- C. 99%
- D. 99.5%
Answer: A
NEW QUESTION 43
How can ApsaraDB for MyBase solve problems in database security and performance interferences in the multi-tenant scenario?
- A. ApsaraDB for MyBase supports resource over commitment.
- B. Instances can be migrated. You can manually migrate instances to idle hosts.
- C. Isolated hosts are used. A host runs only your instances and does not run instances of other users.
- D. ApsaraDB for MyBase allows you to distribute different types of instances at a time.
Answer: C
NEW QUESTION 44
lf Oracle databases need to be migrated to Alibaba Cloud, which of the following product solutions :an be recommended? (Number of correct answers: 3)
- A. Use ApsaraDB for Redis as a cache service to provide acceleration capabilities.
- B. Use Data Transmission Service (DTS) to migrate data.
- C. Use Advanced Database & Application Migration (ADAM) to evaluate the migration project.
- D. Use PolarDB-0 that is highly compatible with Oracle.
Answer: B,C,D
NEW QUESTION 45
When a backup file of core sensitive data is downloaded, business systems must be protected against data breaches. Which of the following capabilities must be enabled to ensure data security?
- A. Transparent Data Encryption (TDE)
- B. Secure Sockets Layer (SSL) encryption
- C. Virtual private cloud (VPC)
- D. SOL audit
Answer: B
NEW QUESTION 46
Which of the following is the wrong statement about PolarDB design architecture?
- A. 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
- B. A PolarDB cluster contains one primary instance and up to 15 read-only instances
- C. PolarDB consolidate compute processes and storage processes in one box, allowing the database capacity to scale up and down to meet your application needs in Alibaba Cloud
- D. Read/write splitting is enabled for PolarDB clusters by default, providing transparent, highly available, and self-adaptive load balancing for your database
Answer: C
Explanation:
Explanation
PolarDB decouples compute from storage.
https://www.alibabacloud.com/help/doc-detail/58766.htm?spm=a2c63.p38356.b99.11.4e333181dMpFmV
NEW QUESTION 47
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 MySQL
- D. PolarDB PosgreSQL
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/58768.htm?spm=a2c63.l28256.b99.10.71ce3784cXj0y8
NEW QUESTION 48
Why is ApsaraDB for PolarDB better than other traditional database engines? (The number of answer: 3)
- A. The PolarDB database engine won't require you to replicate data when adding read-only nodes
- B. ApsaraDB for PolarDB uses the pay-as-you-go billing method, therefore you only need to pay for the storage resources you actually use
- C. When you purchase a PolarDB cluster, you don't need to specify the storage capacity you want to purchase
- D. PolarDB supports both OLTP and OLAP scenarios very well
Answer: A,B,C
Explanation:
Explanation
Kernel Features: OLTP performance.
https://www.alibabacloud.com/help/doc-detail/172293.htm?spm=a2c63.p38356.b99.81.101b333ePsD0YF
NEW QUESTION 49
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 lineage
- B. Data visualization
- C. Data quality
- D. Data service
- E. Data directory
Answer: A,C,D
NEW QUESTION 50
Which of the following data is not collected when database information is collected in Advanced Database & Application Migration (ADAM)?
- A. Historical performance data
- B. Database configuration data
- C. Business data
- D. Business structure data
Answer: C
NEW QUESTION 51
Which of the following deployment architectures are supported by Alibaba Cloud ApsaraDB for MongoDB?
(Number of correct answers: 3)
- A. Sharded cluster instance
- B. Replica set instance that consists of three nodes
- C. Standalone instance
- D. Replica set instance that consists of six nodes
- E. Primary/secondary instance that consists of two nodes
Answer: A,B,C
NEW QUESTION 52
Which of the following architectures is not supported by ApsaraDB RDS for MySQL?
- A. The serverless architecture, in which computing resources are charged based on the Pay-As-You-Go (PAYG) billing method
- B. The single-node Basic Edition architecture, which can be used in test and non-core production environments
- C. The three-node Enterprise Edition architecture, which ensures zero data loss
- D. The high-avail ability architecture, in which primary and read-only nodes are deployed to implement automatic failovers
Answer: A
NEW QUESTION 53
If you have a development team with several developers working on cloud databases, which product is recommended to use for development collaboration?
- A. DAS
- B. DBS
- C. DTS
- D. DG
- E. DMS
Answer: E
Explanation:
Explanation
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
NEW QUESTION 54
Which of the following is the lowest recovery point objective (RPO) for Database Backup Service?
- A. Days
- B. Hours
- C. Minutes
- D. Seconds
Answer: C
NEW QUESTION 55
Which of the following are database architectures which have emerged during the evolution of database systems? (Number of correct answers: 3)
- A. Shared Everything
- B. Dedicated
- C. Single Instance
- D. Shared Nothing
Answer: A,B,D
NEW QUESTION 56
Your DTS (Data Transmission Service) migration has failed halfway through: what options do you have? (Number of correct answers: 2)
- A. Your database can't be migrated: you need to abandon the migration
- B. You need to switch to ADAM, as DTS cannot complete the migration
- C. Delete your DTS instance and start over
- D. Restart the migration task from the console
Answer: B,D
NEW QUESTION 57
Which database utility is good for database management and DevOps?
- A. DAS
- B. DBS
- C. DTS
- D. ADAM
- E. DMS
Answer: E
Explanation:
Explanation
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
NEW QUESTION 58
Which of the following is the most efficient backup in ApsaraDB for MongoDB?
- A. Full backup
- B. Logical backup
- C. Snapshot backup
- D. Physical backup
Answer: D
NEW QUESTION 59
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 an RDS database, back to itself
- C. From RDS to an ECS-based database
- D. From Alibaba Cloud RDS to other database systems
Answer: A,C,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 60
Which of the following tasks cannot be completed by using Advanced Database & Application Migration (ADAM)?
- A. Data structure conversion
- B. Data migration
- C. De-Oracle workload evaluation
- D. Performance monitoring
Answer: A
NEW QUESTION 61
Which of the following statements about Alibaba Cloud ApsaraDB for MongoDB is true?
- A. DataWorks is not supported for MongoDB data processing.
- B. 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.
- C. 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.
Answer: B
NEW QUESTION 62
Alibaba Cloud DTS (Data Transmission Service) is a file migration tool.
- A. False
- B. True
Answer: A
Explanation:
Explanation
DTS is a data migration, integration, synchronization and change tracking tool.
https://www.alibabacloud.com/help/doc-detail/176063.htm?spm=a2c63.l28256.b99.6.490d7142CiFvPb
NEW QUESTION 63
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