Alibaba Cloud ACA-BigData1 問題集

質問 1：
MaxCompute is a general purpose, fully managed, multi-tenancy data processing platform for largescale data warehousing, and it is mainly used for storage and computing of batch structured data. Which of the following is not a use case for MaxCompute?
Score 2
A. Date Warehouse
B. Order management
C. Social networking analysis
D. User profile
正解：B

質問 2：
Where is the meta data(e.g.,table schemas) in Hive?
Score 2
A. Stored along with the data in HDFS
B. Stored in the RDBMS like MySQL
C. Stored as metadata on the NameNode
D. Stored in ZooKeeper
正解：B

質問 3：
AliOrg Company plans to migrate their data with virtually no downtime. They want all the data changes to the source database that occur during the migration are continuously replicated to the target, allowing the source database to be fully operational during the migration process. After the database migration is completed, the target database will remain synchronized with the source for as long as you choose, allowing you to switch over the database at a convenient time. Which of the following Alibaba products is the right choice for you to do it:
Score 2
A. DTS(Data Transmission Service)
B. CloudMonitor
C. Message Service
D. Log Service
正解：A

質問 4：
If the DataWorks(MaxCompute) tables in your request belong to two owners. In this case, Data Guard(DataWorks component) automatically splits your request into two by table owner.
Score 1
A. False
B. True
正解：B

質問 5：
In MaxCompute command line, if you want to view all tables in a project, you can execute command:
______.
Score 2
A. desc tables;
B. show tables;
C. select tables;
D. use tables;
正解：B

質問 6：
Alibaba Cloud Elastic MapReduce (E-MapReduce) is a big data processing solution to quickly process huge amounts of data. Based on open source Apache Hadoop and Apache Spark, E-MapReduce flexibly manages your big data use cases such as trend analysis, data warehousing, and analysis of continuously streaming data.
Score 1
A. False
B. True
正解：B

質問 7：
DataService Studio in DataWorks aims to build a data service bus to help enterprises centrally manage private and public APIs. DataService Studio allows you to quickly create APIs based on data tables and register existing APIs with the DataService Studio platform for centralized management and release. Which of the following descriptions about DataService Studio in DataWorks is INCORRECT?
Score 2
A. DataService Studio adopts the serverless architecture. All you need to care is the query logic of APIs, instead of the infrastructure such as the running environment.
B. To meet the personalized query requirements of advanced users, DataService Studio provides the custom Python script mode to allow you compile the API query by yourself. It also supports multi-table association, complex query conditions, and aggregate functions.
C. DataService Studio is connected to API Gateway. Users can deploy APIs to API Gateway with oneclick.
D. Users can deploy any APIs created and registered in DataService Studio to API Gateway for management, such as API authorization and authentication, traffic control, and metering
正解：B

質問 8：
Apache Spark included in Alibaba E-MapReduce(EMR) is a fast and general-purpose cluster computing system. It provides high-level APIs in Java, Scala, Python and R, and an optimized engine that supports general execution graphs. It also supports a rich set of higher-level tools. Which of the following tools does not be included in Spark?
Score 2
A. GraphX for graph processing
B. TensorFlow for AI
C. MLlib for machine learning
D. Spark SQL for SQL and structured data processing
正解：B