Best Preparations of ACA-Database Exam 2021 Alibaba Database Unlimited 82 Questions
Focus on ACA-Database All-in-One Exam Guide For Quick Preparation.
NEW QUESTION 47
Which of the following are the core technologies behind Database Backup Service? (Number of correct answers: 3)
- A. Online query and analysis
- B. Real-time synchronization
- C. High mount speeds (a few seconds)
- D. Multi-cloud and multi-backend backup
Answer: B,C,D
NEW QUESTION 48
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 49
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 50
Which of the following statements is NOT correct about the benefits you can gain through PolarDB?
- A. locked backup
- B. When you add a read-only node in an ApsaraDB for PolarDB cluster, you only need to pay for computing resources
- C. Millisecond-level latency in physical replication
- D. Elastic scaling within minutes
- E. Large storage space
Answer: A
Explanation:
Explanation
Lock-free backup.
https://www.alibabacloud.com/help/doc-detail/58768.htm?spm=a2c63.p38356.b99.10.1bcb7338k86bX5
NEW QUESTION 51
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 52
What is the maximum storage size that PolarDB currently provides?
- A. 100TB
- B. 50TB
- C. 1TB
- D. 10TB
Answer: A
Explanation:
Explanation
Each PolarDB cluster supports to scale up to 100 TB. https://www.alibabacloud.com/product/polardb
NEW QUESTION 53
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 54
Which of the following is the lowest recovery point objective (RPO) for Database Backup Service?
- A. Seconds
- B. Hours
- C. Minutes
- D. Days
Answer: C
NEW QUESTION 55
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 56
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: A
NEW QUESTION 57
Which of the following statements about Data Management (DMS) permissions management is NOT true?
- A. You cannot directly submit changes even if you have permissions to make changes.
- B. You must create different database accounts for each Alibaba Cloud account.
- C. The permissions of the accounts of resigned or transferred personnel can be automatically managed by using OpenAPI.
- D. You can assign different resources and operation permissions to an Alibaba Cloud account as needed.
Answer: A
NEW QUESTION 58
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 59
From which of the following data sources or databases can Data Lake Analytics (DLA) read data for analysis?
(Number of correct answers: 6)
- A. OTS
- B. MongoDB
- C. AnolyticDB
- D. Oracle
- E. HOLO
- F. OSS
- G. MySQL
Answer: A,B,C,D,F,G
NEW QUESTION 60
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 61
Which of the following statements about AnalyticDB for MySQL is true?
- A. AnalyticDB for MySQL is a NoSQL database.
- B. AnalyticDB for MySQL can be used to build enterprise-grade data warehouse projects.
- C. AnalyticDB for MySQL can be used to build online transaction systems.
- D. AnalyticDB for MySQL supports transactions.
Answer: B
NEW QUESTION 62
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 63
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 64
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 65
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 66
......
Guaranteed Success with ACA-Database Dumps: https://www.exam4free.com/ACA-Database-valid-dumps.html
