[Oct-2021] Updated Alibaba Database ACA-Database Exam Questions BUNDLE PACK
Master The Alibaba Cloud Content ACA-Database EXAM DUMPS WITH GUARANTEED SUCCESS!
NEW QUESTION 16
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 17
What is the maximum number of read-only nodes in a PolarDB cluster?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION 18
Which of the following specifications of AnalyticDB supports tiered storage of cold and hot data?
- A. Basic Edition
- B. Elastic Mode
- C. C series
- D. S series
Answer: B
NEW QUESTION 19
Which of the following architectures is not supported by ApsaraDB RDS for MySQL?
- A. The serverless architecture, in which computing resources are charged based on the Pay-As-You-Go (PAYG) billing method
- B. The high-avail ability architecture, in which primary and read-only nodes are deployed to implement automatic failovers
- C. The single-node Basic Edition architecture, which can be used in test and non-core production environments
- D. The three-node Enterprise Edition architecture, which ensures zero data loss
Answer: A
NEW QUESTION 20
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 21
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 22
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_restore
- C. pg_basebackup
- D. pg_upgrade D.DTS
Answer: C
NEW QUESTION 23
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 24
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 25
Which of the following tasks cannot be completed by using Advanced Database & Application Migration (ADAM)?
- A. De-Oracle workload evaluation
- B. Performance monitoring
- C. Data migration
- D. Data structure conversion
Answer: D
NEW QUESTION 26
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 27
Which of the following statements about Alibaba Cloud ApsaraDB for MongoDB is true?
- A. 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.
- 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. DataWorks is not supported for MongoDB data processing.
Answer: A
NEW QUESTION 28
Which of the following are the advantages of cloud databases over self-managed databases? (Number of correct answers: 3)
- A. Integrated operations and maintenance (O&M), as well as easier management
- B. High availability and comprehensive backup and monitoring capabilities
- C. Stronger service level agreement (SLA)
- D. High costs
Answer: A,B,C
NEW QUESTION 29
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 30
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 31
Which of the following are features supported by Alibaba Cloud RDS for MySQL? (The number of
- A. Read-Write Splitting ->
https://www.alibabacloud.com/help/doc-detail/96047.htm?spm=a2c63.p38356.b99.57.500dc3c6Kt0QLs - B. Local Snapshot Backup-> Snapshot Backup is Cloud disk instance. Cross-region backup is Local disk instance.
- C. 3)
- D. Multi-Zone Deployment ->You can select the Single-zone Deployment or Multi-zone Development method.
https://www.alibabacloud.com/help/doc-detail/26092.htm?spm=a2c63.p38356.b99.18.118b4437l50tDl - E. Computing nodes and Storage totally seperated-> In the Basic Edition, your database system consists of only one primary RDS instance, and computing is separated from storage. This edition is cost-effective.
https://www.alibabacloud.com/help/doc-detail/48980.html?spm=a2c5t.11065259.1996646101.searchclick - F. ACD
Answer: C,F
NEW QUESTION 32
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 33
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 34
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 35
Each PolarDB cluster consists of one primary node and one or more read-only nodes. The system only support manually switch over services from the primary node to a read-only node.
- A. False
- B. True
Answer: A
Explanation:
Explanation
PolarDB cluster supports Manually and Automatically switch over services between primary and read-only nodes.
https://www.alibabacloud.com/help/doc-detail/141229.htm?spm=a2c63.p38356.b99.113.36df231dK2DVX0
NEW QUESTION 36
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 37
You want to migrate from MySQL to PostgreSQL: is this supported by DTS?
- A. No, this type of migration isn't supported
- B. Yes, migration between different types of databases is supported by DTS
- C. You can migrate between MySQL and Oracle but not between PostgreSQL
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/176064.htm?spm=a2c63.p38356.b99.7.3191591dPlcLJa
NEW QUESTION 38
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 39
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