Alibaba Cloud ACA-BigData1 問題集

質問 1：
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 2：
Assume that Task 1 is configured to run at 02:00 each day. In this case, the scheduling system automatically generates a snapshot at the time predefined by the periodic node task at 23:30 each day.
That is, the instance of Task 1 will run at 02:00 the next day. If the system detects the upstream task is complete, the system automatically runs the Task 1 instance at 02:00 the next day.
Score 1
A. False
B. True
正解：B

質問 3：
When we use the MaxCompute tunnel command to upload the log.txt file to the t_log table, the t_log is a partition table and the partitioning column is (p1 string, p2 string).
Which of the following commands is correct?
A. tunnel upload log.txt t_log/(p1="b1", p2="b2")
B. tunnel upload log.txt t_log/p1="b1"/p2="b2"
C. tunnel upload log.txt t_log/p1="b1", p2="b2"
正解：C

質問 4：
commark is an open-source framework that functions on the service level to support data processing and analysis operations. Equipped with unified computing resources and data set permissions, Spark on MaxCompute allows you to submit and run jobs while using your preferred development methods.
Which of the following descriptions about Spark on MaxCompute is NOT correct:
Score 2
A. Spark on MaxCompute provides you with native Spark Web UIs.
B. Spark on MaxCompute has a separate permission system which will not allow users to query data without any additional permission modifications required.
C. Similar to MaxCompute SQL and MaxCompute MapReduce, Spark on MaxCompute runs in the unified computing resources activated for MaxCompute projects.
D. Different versions of Spark can run in MaxCompute at the same time.
正解：D

質問 5：
Machine Learning Platform for Artificial Intelligence (PAI) node is one of the node types in DataWorks business flow. It is used to call tasks created on PAI and schedule production activities based on the node configuration. PAI nodes can be added to DataWorks only _________ .
Score 2
A. after MaxCompute service is activated
B. after PAI experiments are created on PAI
C. Spark on MaxCompute Machine Learning project is created
D. after PAI service is activated
正解：B

質問 6：
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 7：
There are various methods for accessing to MaxCompute, for example, through management console, client command line, and Java API. Command line tool odpscmd can be used to create, operate, or delete a table in a project.
Score 1
A. False
B. True
正解：B

質問 8：
Table is a data storage unit in MaxCompute. It is a two-dimensional logical structure composed of rows and columns. All data is stored in the tables. Operating objects of computing tasks are all tables. A user can perform create table, drop table, and tunnel upload as well as update the qualified data in the table.
Score 1
A. False
B. True
正解：B