ACA-Database Practice Dumps - Verified By CramPDF Updated 82 Questions
Updated ACA-Database Exam Dumps - PDF Questions and Testing Engine
Alibaba Cloud ACA-Database Exam Syllabus Topics:
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NEW QUESTION 38
Which of the following is not a relational database?
- A. Oracle
- B. Redis
- C. Teradata
- D. DB2
Answer: B
NEW QUESTION 39
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. De-identification algorithms can be managed. Multiple algorithms are supported, such as algorithms for masking specific positions and replacing fixed characters.
- D. After you configure de-identification algorithms, you can view the de-identified data.
Answer: D
NEW QUESTION 40
Which of the following statements is NOT correct about the benefits you can gain through PolarDB?
- A. locked backup
- B. Large storage space
- C. Elastic scaling within minutes
- D. Millisecond-level latency in physical replication
- E. When you add a read-only node in an ApsaraDB for PolarDB cluster, you only need to pay for computing resources
Answer: A
Explanation:
Explanation
Lock-free backup.
https://www.alibabacloud.com/help/doc-detail/58768.htm?spm=a2c63.p38356.b99.10.1bcb7338k86bX5
NEW QUESTION 41
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 42
Alibaba Cloud DTS (Data Transmission Service) supports both full database migration and incremental synchronization.
- A. False
- B. True
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/176633.htm?spm=a2c63.p38356.b99.32.3e751a4dtHm9cr /
https://www.alibabacloud.com/help/doc-detail/56776.htm?spm=a2c63.p38356.b99.181.74896b5dro6cDo
NEW QUESTION 43
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 44
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 45
Which of the following statements about Data Transmission Service (DTS) migration scenarios is NOT true?
- A. DTS can migrate data from one source database to one destination database, for example, A > B.
- B. DTS can migrate data from several source databases to one destination database, for example, A > C and B > C.
- C. DTS can migrate data from one source database to several destination databases, for example, A > B and A > C.
- D. DTS can migrate data in a circular way, for example, A > B > C > A.
Answer: D
NEW QUESTION 46
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 47
Which of the following are reasonable Data Transmission Service (DTS) use cases? (Number of correct answers: 4)
- A. Synchronizing data to data warehouses in real time to build data warehouses for real-time analytics.
- B. Change tracking and data distribution.
- C. Synchronizing information about user accounts and permissions.
- D. Configuring data audit rules to manage data quality.
- E. Geo-disaster recovery and active geo-redundancy for databases
- F. Database migration without interrupting services / downtime
Answer: B,E,F
NEW QUESTION 48
Which of the following are NOT true, regarding DTS (Data Transmission Service)? (Number of correct answers: 2)
- A. The source and destination database must both have a database user which DTS can use
- B. If the source database is not on Alibaba Cloud, it must be Internet accessible so that DTS can connect to it
- C. The source and destination database must use the same database engine
- D. DTS is designed for file synchronization
Answer: C,D
NEW QUESTION 49
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. 60%
- B. 70%
- C. 40%
- D. 50%
Answer: B
NEW QUESTION 50
You need to migrate a database that has a storage capacity of 50 GB to the cloud and can tolerate a service downtime of half an hour. In this case, which of the following migration methods is the optimal choice to migrate data to the cloud in terms of stability and availability?
- A. Full backup and incremental backup
- B. Logical migration tools
- C. Incremental backup only
- D. Full backup only
Answer: B
NEW QUESTION 51
Which of the following are the advantages of cloud databases over self-managed databases? (Number of correct answers: 3)
- A. High costs
- B. Integrated operations and maintenance (O&M), as well as easier management
- C. Stronger service level agreement (SLA)
- D. High availability and comprehensive backup and monitoring capabilities
Answer: B,C,D
NEW QUESTION 52
Alibaba Cloud DTS (Database Transmission Service) only supports MySQL databases.
- A. False
- B. True
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/26618.htm?spm=a2c63.p38356.b99.53.1c2b1156hNo8v0
NEW QUESTION 53
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 54
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. RDS Instance
- B. Express Connect DB
- C. ECS-based Databases
- D. ApsaraDB MongoDB
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/96154.htm?spm=a2c63.p38356.b99.118.59de5d1aWUVErx
NEW QUESTION 55
What is the maximum storage size that PolarDB currently provides?
- A. 10TB
- B. 50TB
- C. 100TB
- D. 1TB
Answer: C
Explanation:
Explanation
Each PolarDB cluster supports to scale up to 100 TB. https://www.alibabacloud.com/product/polardb
NEW QUESTION 56
Which of the following is not a feature or usage scenario of Data Lake Analytics (DLA)?
- A. Interactive analysis
- B. Online transaction processing
- C. Stream or micro-batch processing
- D. Batch processing
Answer: B
NEW QUESTION 57
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. False
- B. True
Answer: B
Explanation:
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-
NEW QUESTION 58
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