[Aug-2021] Valid Way To Pass Alibaba Cloud Exam Dumps with ACA-Database Exam Study Guide
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NEW QUESTION 40
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. Ganos
- B. High concurrency optimization
- C. Pase
- D. Point-in-time restore
- E. Slot failover
Answer: D
NEW QUESTION 41
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 42
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. This type of migration isn't possible
- B. Use DTS (Data Transmission Service)
- C. Make a full physical backup of their database and copy it into OSS
- D. Migrate the entire VM hosting the database
Answer: B
NEW QUESTION 43
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 Advanced Database & Application Migration (ADAM) to evaluate the migration project.
- B. Use Data Transmission Service (DTS) to migrate data.
- C. Use PolarDB-0 that is highly compatible with Oracle.
- D. Use ApsaraDB for Redis as a cache service to provide acceleration capabilities.
Answer: A,B,C
NEW QUESTION 44
What does DIM mean in data warehouse terms?
- A. Application data service (ADS)
- B. Dimension table
- C. Operational data store (ODS)
- D. Common data model (CDM)
Answer: B
NEW QUESTION 45
Which database utility is good for database management and DevOps?
- A. DTS
- B. DBS
- C. DMS
- D. DAS
- E. ADAM
Answer: C
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 46
Which of the following features are provided by PolarDB-O's proxy? (Number of correct answers: 4)
- A. Read/write splitting
- B. Data encryption
- C. Load balancing
- D. Failover strategies for high availability
- E. Health checks for nodes
Answer: A,C,D,E
NEW QUESTION 47
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 48
Which of the following statements about Data Transmission Service (DTS) migration scenarios is NOT true?
- A. DTS can migrate data from several source databases to one destination database, for example, A > C and B > C.
- B. DTS can migrate data in a circular way, for example, A > B > C > A.
- C. DTS can migrate data from one source database to one destination database, for example, A > B.
- D. DTS can migrate data from one source database to several destination databases, for example, A > B and A > C.
Answer: B
NEW QUESTION 49
Which of the following is not a relational database?
- A. Oracle
- B. DB2
- C. Teradata
- D. Redis
Answer: D
NEW QUESTION 50
Which of the following is the core benefit of ApsaraDB for Redis Enhanced Edition (Tair)?
- A. Makes data secure and independently managed.
- B. Makes it easy to do business anywhere.
- C. Makes large amounts of data easier to process.
- D. Makes data accessible online and in real time.
Answer: D
NEW QUESTION 51
With ApsaraDB for MyBase, problems caused by a sudden spike in traffic are automatically resolved. How is this done?
- A. ApsaraDB for MyBase grants you host permissions. You can log on to hosts to troubleshoot business problems in an emergency.
- B. ApsaraDB for MyBase allows you to specify a host when you create an instance.
- C. ApsaraDB for My Base allows you to deploy different types of instances in a cluster.
- D. ApsaraDB for MyBase supports elastic upgrade policies. If the resource utilization of a database exceeds the preset threshold during a business peak, ApsaraDB for MyBase can automatically upgrade database resource specifications to respond to the business peak.
- E. ApsaraDB for MyBase supports the over commitment of CPU and disk resources.
Answer: E
NEW QUESTION 52
Which of the following is not a feature or usage scenario of Data Lake Analytics (DLA)?
- A. Stream or micro-batch processing
- B. Interactive analysis
- C. Online transaction processing
- D. Batch processing
Answer: C
NEW QUESTION 53
Which of the following statements about MongoDB is NOT true?
- A. MongoDB supports transactions.
- B. MongoDB is a relational database.
- C. MongoDB is a document database.
- D. MongoDB can be deployed in cluster mode.
Answer: B
NEW QUESTION 54
Which of the following statements is NOT correct about PolarDB?
- A. 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
- B. ApsaraDB for PolarDB is designed to handle large amounts of sequential queries
- C. Each ApsaraDB for PolarDB cluster supports up to 100 TB of storage space and can handle up to one million queries per second (QPS)
- D. ApsaraDB for PolarDB is a cloud-native relational database service that is compatible with the MySQL, PostgreSQL, and Oracle engines
- E. ApsaraDB for PolarDB can scale clusters within a few minutes, recover from failures within a few seconds, and guarantee data consistency
Answer: B
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 55
Which are the supported DB engine for PolarDB so far? (The number of answer: 3)
- A. PolarDB for Postgres
- B. PolarDB for SQLserver
- C. PolarDB for Oracle
- D. PolarDB for Mysql
Answer: A,C,D
Explanation:
Explanation
PolarDB is a cloud-native relational database compatible with MySQL, PostgreSQL, and Oracle.
https://www.alibabacloud.com/product/polardb
NEW QUESTION 56
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