New (2022) Alibaba Cloud ACA-Database Exam Dumps
Best Way To Study For Alibaba Cloud ACA-Database Exam Brilliant ACA-Database Exam Questions PDF
NEW QUESTION 16
Which of the following is the core benefit of ApsaraDB for Redis Enhanced Edition (Tair)?
- A. Makes it easy to do business anywhere.
- B. Makes data accessible online and in real time.
- C. Makes large amounts of data easier to process.
- D. Makes data secure and independently managed.
Answer: B
NEW QUESTION 17
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: B
NEW QUESTION 18
Which of the following statements about Alibaba Cloud ApsaraDB for MongoDB is true?
- A. DataWorks is not supported for MongoDB data processing.
- B. 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.
- C. 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.
Answer: C
NEW QUESTION 19
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 20
Which of the following is the most efficient backup in ApsaraDB for MongoDB?
- A. Logical backup
- B. Full backup
- C. Snapshot backup
- D. Physical backup
Answer: D
NEW QUESTION 21
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 22
Which of the following statements about the compatibility of AnalyticDB for PostgreSQL is NOT true?
- A. Support for the SQL2003 syntax standard
- B. Support for the Java Database Connectivity (JDBC) protocol
- C. Fully compatible with Oracle syntax
- D. Compliance with PostgreSQL and Greenplum protocols
Answer: C
NEW QUESTION 23
Which of the following statements about MongoDB is NOT true?
- A. MongoDB is a document database.
- B. MongoDB is a relational database.
- C. MongoDB supports transactions.
- D. MongoDB can be deployed in cluster mode.
Answer: B
NEW QUESTION 24
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
Answer: A
NEW QUESTION 25
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
Answer: C
NEW QUESTION 26
Which migration modes are supported by DTS (Data Transmission Service)? (Number of correct answer: 3)
- A. From RDS to an ECS-based database
- B. From a different cloud provider to Alibaba Cloud
- C. From an RDS database, back to itself
- D. From Alibaba Cloud RDS to other database systems
Answer: A,B,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 27
Which of the following is not a component of the PolarDB-0 architecture in Apsara Stack?
- A. Proxy
- B. SAN
- C. FC Switch
- D. RDMA
Answer: B
NEW QUESTION 28
Which of the following is NOT true, regarding DTS (Database Transmission Service)?
- A. DTS can migrate both data and table schema
- B. DTS works for database both on and off Alibaba Cloud
- C. DTS cannot be used for incremental database synchronization
- D. DTS supports multiple database engines
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/56776.htm?spm=a2c63.p38356.b99.181.74896b5dro6cDo
NEW QUESTION 29
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 Box
- B. PolarDB Oracle
- C. PolarDB PosgreSQL
- D. PolarDB MySQL
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/58768.htm?spm=a2c63.l28256.b99.10.71ce3784cXj0y8
NEW QUESTION 30
From which of the following data sources or databases can Data Lake Analytics (DLA) read data for analysis?
(Number of correct answers: 6)
- A. AnolyticDB
- B. Oracle
- C. MongoDB
- D. OSS
- E. HOLO
- F. MySQL
- G. OTS
Answer: A,B,C,D,F,G
NEW QUESTION 31
Which of the following types of data are most suitable for storage in MySQL databases?
- A. Structured data in rows and columns
- B. Large amounts of time series data
- C. Key-value (KV) data that is frequently read and written
- D. Document-oriented unstructured data
Answer: A
NEW QUESTION 32
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. Logical migration tools
- B. Full backup only
- C. Full backup and incremental backup
- D. Incremental backup only
Answer: A
NEW QUESTION 33
Which database utility is used for data migration and synchronization?
- A. DTS
- B. DAS
- C. DBS
- D. ADAM
- E. DMS
Answer: A
Explanation:
Explanation
Data Transmission Service is charged based according to three models: Data Synchronization, Data Migration, Change Tracking. https://www.alibabacloud.com/product/data-transmission-service/pricing
NEW QUESTION 34
Which of the following are NOT true, regarding DTS (Data Transmission Service)? (Number of correct answers: 2)
- A. The source and destination database must use the same database engine
- B. If the source database is not on Alibaba Cloud, it must be Internet accessible so that DTS can connect to it
- C. DTS is designed for file synchronization
- D. The source and destination database must both have a database user which DTS can use
Answer: A,C
NEW QUESTION 35
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
Answer: B
Explanation:
Explanation
PolarDB decouples compute from storage.
https://www.alibabacloud.com/help/doc-detail/58766.htm?spm=a2c63.p38356.b99.11.4e333181dMpFmV
NEW QUESTION 36
Which of the following are the advantages of cloud databases over self-managed databases? (Number of correct answers: 3)
- A. High costs
- B. Stronger service level agreement (SLA)
- C. Integrated operations and maintenance (O&M), as well as easier management
- D. High availability and comprehensive backup and monitoring capabilities
Answer: B,C,D
NEW QUESTION 37
Which of the following data is not collected when database information is collected in Advanced Database & Application Migration (ADAM)?
- A. Business data
- B. Business structure data
- C. Database configuration data
- D. Historical performance data
Answer: A
NEW QUESTION 38
Alibaba Cloud DTS (Data Transmission Service) supports both full database migration and incremental synchronization.
- A. True
- B. False
Answer: A
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 39
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