Get 100% Passing Success With True ACA-Database Exam! [Oct-2021]
Alibaba Cloud ACA-Database PDF Questions - Exceptional Practice To ACA Database Certification
NEW QUESTION 24
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 25
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 RDS to an ECS-based database
- 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 26
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 27
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. 70%
- B. 60%
- C. 50%
- D. 40%
Answer: A
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. True
- B. False
Answer: A
NEW QUESTION 29
Your client is having trouble connecting DTS to their source database in their local datacenter, why might this be?
- A. Their database isn't on Alibaba Cloud already so it cannot be accessed by DTS
- B. Their database is an inverted column store, which is not supported
- C. Their database is not accessible from the Internet, so DTS cannot access it
- D. Their database must not include the special DTS compatibility mode
Answer: C
NEW QUESTION 30
Which of the following architectures are supported by ApsaraDB for Redis Enhanced Edition (Tair)? (Number of correct answers: 3)
- A. Single-node architecture
- B. Cluster master-replica instances
- C. Read/write splitting architecture in which standard master-replica instances are deployed
- D. Master-replica architecture in which standard master-replica instances are deployed
Answer: B,C,D
NEW QUESTION 31
Which of these are NOT good use cases for DTS (Data Transmission Service)? (Number of correct answers: 2)
- A. Undoing changes made to a database by mistake
- B. Saving database logs
- C. Full database synchronization for database migration
- D. Incremental synchronization for disaster recovery
Answer: A,B
NEW QUESTION 32
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. ECS-based Databases
- C. ApsaraDB MongoDB
- D. Express Connect DB
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/96154.htm?spm=a2c63.p38356.b99.118.59de5d1aWUVErx
NEW QUESTION 33
Which of the following are reasonable Data Transmission Service (DTS) use cases? (Number of correct answers: 4)
- A. Database migration without interrupting services / downtime
- B. Synchronizing data to data warehouses in real time to build data warehouses for real-time analytics.
- C. Geo-disaster recovery and active geo-redundancy for databases
- D. Change tracking and data distribution.
- E. Configuring data audit rules to manage data quality.
- F. Synchronizing information about user accounts and permissions.
Answer: A,C,D
NEW QUESTION 34
If a database exception occurs in a PolarDB cluster because important data is deleted by mistake, how i can data be restored?
- A. Level-2 backup
- B. Level 1 backup + Redo log
- C. Level-1 backup
- D. Level-2 backup + Redo log
Answer: D
NEW QUESTION 35
Which of the following is not a relational database?
- A. Oracle
- B. DB2
- C. Teradata
- D. Redis
Answer: D
NEW QUESTION 36
Which of the following is the high-availability service level that is specified in the ApsaraDB RDS Service Level Agreement (SLA)?
- A. 99%
- B. 90%
- C. 99.99%
- D. 99.5%
Answer: C
NEW QUESTION 37
Which of the following databases are supported by DTS (Database Transmission Service)? (Number of correct answers: 3)
- A. SQL Server
- B. DB2
- C. PostreSQL
- D. MySQL
Answer: A,C,D
Explanation:
Explanation
DB2 is supported, but very limited.
https://www.alibabacloud.com/help/doc-detail/176064.htm?spm=a2c63.l28256.b99.7.13c27142yYyvXz
NEW QUESTION 38
Which of the following are NOT true, regarding DTS (Data Transmission Service)? (Number of correct answers: 2)
- A. DTS is designed for file synchronization
- B. The source and destination database must use the same database engine
- C. If the source database is not on Alibaba Cloud, it must be Internet accessible so that DTS can connect to it
- D. The source and destination database must both have a database user which DTS can use
Answer: A,B
NEW QUESTION 39
Your DTS (Data Transmission Service) migration has failed halfway through: what options do you have? (Number of correct answers: 2)
- A. Delete your DTS instance and start over
- B. Restart the migration task from the console
- C. Your database can't be migrated: you need to abandon the migration
- D. You need to switch to ADAM, as DTS cannot complete the migration
Answer: B,D
NEW QUESTION 40
Which of the following types of data that is stored in PostgreSQL databases can support the one-to-many data model? (Number of correct answers: 3)
- A. Cube
- B. String
- C. Range
- D. Array
- E. JSONB
- F. JSON
- G. GIS
Answer: B,D,F
NEW QUESTION 41
Which of the following features is provided by Data Management (DMS)?
- A. Integrates data across multiple data sources
- B. Evaluates the database migration project
- C. Enables online database management, such as data query, database and table management, and permission management
- D. Backs up multiple types of databases
Answer: B
NEW QUESTION 42
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 43
Which of the following is NOT true, regarding DTS (Database Transmission Service)?
- A. DTS works for database both on and off Alibaba Cloud
- B. DTS can migrate both data and table schema
- C. DTS supports multiple database engines
- D. DTS cannot be used for incremental database synchronization
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/56776.htm?spm=a2c63.p38356.b99.181.74896b5dro6cDo
NEW QUESTION 44
Which of the following is not a component of the PolarDB-0 architecture in Apsara Stack?
- A. FC Switch
- B. SAN
- C. RDMA
- D. Proxy
Answer: B
NEW QUESTION 45
Which of the followings is NOT a correct way to connect to PolarDB?
- A. Use DMS to connect to a cluster
- B. Use the command line like 'mysql' to connect to a cluster
- C. Use a client like HeidiSQL to connect to a cluster
- D. Use PolarDB console to log into a cluster
Answer: D
Explanation:
Explanation
Use the PolarDB console to log on to Database.
https://www.alibabacloud.com/help/doc-detail/68511.htm?spm=a2c63.p38356.879954.7.7c2855b1aLLHjb#task-
NEW QUESTION 46
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 47
Which of the following are relational databases? (Number of correct answers: 5)
- A. PostgreSQL
- B. TSDB
- C. MariaDB
- D. SQL Server
- E. Oracle
- F. MySQL
- G. Redis
- H. HBase
- I. MongoDB
Answer: A,C,D,E,F
NEW QUESTION 48
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