[2022年01月] 実際問題を使ってACA-Database無料問題集サンプルと問題と練習テストエンジン
合格させるAlibaba Cloud ACA-Database試験問題でテスト復刻エンジンとPDF
質問 40
Which of the following architectures is not supported by ApsaraDB RDS for MySQL?
- A. The single-node Basic Edition architecture, which can be used in test and non-core production environments
- B. The three-node Enterprise Edition architecture, which ensures zero data loss
- C. The serverless architecture, in which computing resources are charged based on the Pay-As-You-Go (PAYG) billing method
- D. The high-avail ability architecture, in which primary and read-only nodes are deployed to implement automatic failovers
正解: C
質問 41
Alibaba Cloud DTS (Data Transmission Service) is a file migration tool.
- A. False
- B. True
正解: A
解説:
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
質問 42
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. SOL audit
- D. Virtual private cloud (VPC)
正解: B
質問 43
What is the maximum storage size that PolarDB currently provides?
- A. 100TB
- B. 10TB
- C. 1TB
- D. 50TB
正解: A
解説:
Explanation
Each PolarDB cluster supports to scale up to 100 TB. https://www.alibabacloud.com/product/polardb
質問 44
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. DG
- C. DTS
- D. DBS
- E. DMS
正解: E
解説:
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
質問 45
Which of the following features are provided by PolarDB-O's proxy? (Number of correct answers: 4)
- A. Data encryption
- B. Load balancing
- C. Read/write splitting
- D. Failover strategies for high availability
- E. Health checks for nodes
正解: B,C,D,E
質問 46
What does DIM mean in data warehouse terms?
- A. Operational data store (ODS)
- B. Common data model (CDM)
- C. Application data service (ADS)
- D. Dimension table
正解: D
質問 47
PolarDB for MySQL archive databases use log-structured merge-trees (LSM trees) and the Zstandard (ZSTD) data compression algorithm to increase the data compression ratio. How much storage can be saved, at most?
- A. 40%
- B. 50%
- C. 60%
- D. 70%
正解: D
質問 48
Which of the following is the wrong statement about PolarDB design architecture?
- A. A PolarDB cluster contains one primary instance and up to 15 read-only instances
- B. 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
- C. 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
- D. Read/write splitting is enabled for PolarDB clusters by default, providing transparent, highly available, and self-adaptive load balancing for your database
正解: B
解説:
Explanation
PolarDB decouples compute from storage.
https://www.alibabacloud.com/help/doc-detail/58766.htm?spm=a2c63.p38356.b99.11.4e333181dMpFmV
質問 49
Why is ApsaraDB for PolarDB better than other traditional database engines? (The number of answer: 3)
- A. PolarDB supports both OLTP and OLAP scenarios very well
- 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. The PolarDB database engine won't require you to replicate data when adding read-only nodes
- D. When you purchase a PolarDB cluster, you don't need to specify the storage capacity you want to purchase
正解: B,C,D
解説:
Explanation
Kernel Features: OLTP performance.
https://www.alibabacloud.com/help/doc-detail/172293.htm?spm=a2c63.p38356.b99.81.101b333ePsD0YF
質問 50
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 directory
- C. Data visualization
- D. Data quality
- E. Data service
正解: A,D,E
質問 51
Which of the following features is provided by Data Management (DMS)?
- A. Evaluates the database migration project
- B. Enables online database management, such as data query, database and table management, and permission management
- C. Backs up multiple types of databases
- D. Integrates data across multiple data sources
正解: A
質問 52
Which of the following features is NOT supported by Data Transmission Service (DTS)?
- A. Data synchronization
- B. Change tracking
- C. Data backup
- D. Data migration
正解: B
質問 53
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
正解: A
解説:
Explanation
https://www.alibabacloud.com/help/doc-detail/26652.htm?spm=a2c63.p38356.879954.26.2ab232664Wkc2m#co
質問 54
Which of the following statements about Data Management (DMS) permissions management is NOT true?
- A. The permissions of the accounts of resigned or transferred personnel can be automatically managed by using OpenAPI.
- B. You cannot directly submit changes even if you have permissions to make changes.
- C. You must create different database accounts for each Alibaba Cloud account.
- D. You can assign different resources and operation permissions to an Alibaba Cloud account as needed.
正解: B
質問 55
Which database utility is good for database management and DevOps?
- A. DAS
- B. DTS
- C. DBS
- D. ADAM
- E. DMS
正解: E
解説:
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
質問 56
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
正解: A
解説:
Explanation
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-
質問 57
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. 0
- B. 1
- C. 2
- D. 3
正解: B
質問 58
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