[Feb-2022] Dumps Practice Exam Questions Study Guide for the ACA-Database Exam
ACA-Database Dumps with Practice Exam Questions Answers
NEW QUESTION 10
Which of the following architectures are supported by ApsaraDB for Redis Enhanced Edition (Tair)? (Number of correct answers: 3)
- A. Master-replica architecture in which standard master-replica instances are deployed
- B. Cluster master-replica instances
- C. Single-node architecture
- D. Read/write splitting architecture in which standard master-replica instances are deployed
Answer: A,B,D
NEW QUESTION 11
Which of the following is the lowest recovery point objective (RPO) for Database Backup Service?
- A. Seconds
- B. Minutes
- C. Hours
- D. Days
Answer: B
NEW QUESTION 12
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. You need to switch to ADAM, as DTS cannot complete the migration
- C. Restart the migration task from the console
- D. Your database can't be migrated: you need to abandon the migration
Answer: B,C
NEW QUESTION 13
Which of the following features are provided by PolarDB-O's proxy? (Number of correct answers: 4)
- A. Data encryption
- B. Load balancing
- C. Read/write splitting
- D. Failover strategies for high availability
- E. Health checks for nodes
Answer: B,C,D,E
NEW QUESTION 14
Which of the following specifications of AnalyticDB supports tiered storage of cold and hot data?
- A. Elastic Mode
- B. S series
- C. Basic Edition
- D. C series
Answer: A
NEW QUESTION 15
Which of the following are the core technologies behind Database Backup Service? (Number of correct answers: 3)
- A. Real-time synchronization
- B. High mount speeds (a few seconds)
- C. Multi-cloud and multi-backend backup
- D. Online query and analysis
Answer: A,B,C
NEW QUESTION 16
Which of the following statements about Data Management (DMS) permissions management is NOT true?
- A. The permissions of the accounts of resigned or transferred personnel can be automatically managed by using OpenAPI.
- B. You cannot directly submit changes even if you have permissions to make changes.
- C. You must create different database accounts for each Alibaba Cloud account.
- D. You can assign different resources and operation permissions to an Alibaba Cloud account as needed.
Answer: B
NEW QUESTION 17
Why is ApsaraDB for PolarDB better than other traditional database engines? (The number of answer: 3)
- A. PolarDB supports both OLTP and OLAP scenarios very well
- B. ApsaraDB for PolarDB uses the pay-as-you-go billing method, therefore you only need to pay for the storage resources you actually use
- C. The PolarDB database engine won't require you to replicate data when adding read-only nodes
- D. When you purchase a PolarDB cluster, you don't need to specify the storage capacity you want to purchase
Answer: B,C,D
Explanation:
Explanation
Kernel Features: OLTP performance.
https://www.alibabacloud.com/help/doc-detail/172293.htm?spm=a2c63.p38356.b99.81.101b333ePsD0YF
NEW QUESTION 18
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 19
How can ApsaraDB for MyBase solve problems in database security and performance interferences in the multi-tenant scenario?
- A. ApsaraDB for MyBase allows you to distribute different types of instances at a time.
- B. Instances can be migrated. You can manually migrate instances to idle hosts.
- C. ApsaraDB for MyBase supports resource over commitment.
- D. Isolated hosts are used. A host runs only your instances and does not run instances of other users.
Answer: D
NEW QUESTION 20
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 directory
- C. Data visualization
- D. Data quality
- E. Data service
Answer: A,D,E
NEW QUESTION 21
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 22
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 23
Which of the following statements about AnalyticDB for MySQL is true?
- A. AnalyticDB for MySQL can be used to build online transaction systems.
- B. AnalyticDB for MySQL supports transactions.
- C. AnalyticDB for MySQL is a NoSQL database.
- D. AnalyticDB for MySQL can be used to build enterprise-grade data warehouse projects.
Answer: D
NEW QUESTION 24
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 25
Which of the following tools can be used to migrate an on-premises database to Alibaba Cloud while causing minimal service downtime?
- A. pg_upgrade D.DTS
- B. pg_dump
- C. pg_restore
- D. pg_basebackup
Answer: D
NEW QUESTION 26
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. Express Connect DB
- B. ApsaraDB MongoDB
- C. ECS-based Databases
- D. RDS Instance
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/96154.htm?spm=a2c63.p38356.b99.118.59de5d1aWUVErx
NEW QUESTION 27
Which of the following are relational databases? (Number of correct answers: 5)
- A. Oracle
- B. PostgreSQL
- C. MongoDB
- D. Redis
- E. SQL Server
- F. HBase
- G. TSDB
- H. MariaDB
- I. MySQL
Answer: A,B,E,H,I
NEW QUESTION 28
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 29
Which of the following are database architectures which have emerged during the evolution of database systems? (Number of correct answers: 3)
- A. Single Instance
- B. Shared Everything
- C. Shared Nothing
- D. Dedicated
Answer: B,C,D
NEW QUESTION 30
Which of the following is not a feature or usage scenario of Data Lake Analytics (DLA)?
- A. Interactive analysis
- B. Online transaction processing
- C. Batch processing
- D. Stream or micro-batch processing
Answer: B
NEW QUESTION 31
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