ACA-Database PDF Dumps Jan 11, 2022 Exam Questions – Valid ACA-Database Dumps
Ultimate ACA-Database Guide to Prepare Free Latest Alibaba Cloud Practice Tests Dumps
Alibaba Cloud ACA-Database Exam Syllabus Topics:
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NEW QUESTION 18
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 19
Which of the following features is NOT supported by Data Transmission Service (DTS)?
- A. Data backup
- B. Data migration
- C. Change tracking
- D. Data synchronization
Answer: C
NEW QUESTION 20
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 21
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 22
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 23
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 24
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
Answer: C
NEW QUESTION 25
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 26
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 27
Which of the following tools can be used to migrate an on-premises database to Alibaba Cloud while causing minimal service downtime?
- A. pg_dump
- B. pg_basebackup
- C. pg_restore
- D. pg_upgrade D.DTS
Answer: B
NEW QUESTION 28
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 29
Which of the following statements is NOT correct about PolarDB?
- A. ApsaraDB for PolarDB is a cloud-native relational database service that is compatible with the MySQL, PostgreSQL, and Oracle engines
- B. ApsaraDB for PolarDB can scale clusters within a few minutes, recover from failures within a few seconds, and guarantee data consistency
- C. An ApsaraDB for PolarDB cluster can also be scaled out to a maximum of 16 nodes, and provide up to 6 times of performance improvement traditional MySQL clusters at a 30% to 50% cost reduction
- D. Each ApsaraDB for PolarDB cluster supports up to 100 TB of storage space and can handle up to one million queries per second (QPS)
- E. ApsaraDB for PolarDB is designed to handle large amounts of sequential queries
Answer: E
Explanation:
Explanation
PolarDB is 6 times faster than standard MySQL database in handling large amounts of concurrent queries.
https://www.alibabacloud.com/product/polardb
NEW QUESTION 30
Which of the following specifications of AnalyticDB supports tiered storage of cold and hot data?
- A. C series
- B. S series
- C. Elastic Mode
- D. Basic Edition
Answer: C
NEW QUESTION 31
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 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. High concurrency optimization
- B. Pase
- C. Point-in-time restore
- D. Ganos
- E. Slot failover
Answer: C
NEW QUESTION 33
You can purchase more read-only nodes after you have created a cluster. If the primary node fails, the system automatically promotes the read-only node with the highest failover priority to become the new primary node while restoring the faulty node.
- A. False
- B. True
Answer: B
Explanation:
Explanation
Each node in a PolarDB cluster has a failover priority. The system performs the following steps to automatically elect a primary node:
Find all the read-only nodes that can be elected as the primary node.
Select one or more read-only nodes that have the highest failover priority.
If the failover to the first node fails due to reasons, such as network issues and abnormal replication status, the system tries to switch to another node until the failover succeeds.
https://www.alibabacloud.com/help/doc-detail/141229.htm?spm=a2c63.p38356.b99.113.36df231dK2DVX0
NEW QUESTION 34
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 35
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 36
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 37
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