Alibaba Cloud ACA-BigData1 問題集

質問 1：
MaxCompute supports two kinds of charging methods: Pay-As-You-Go and Subscription (CU cost).
Pay-As-You-Go means each task is measured according to the input size by job cost. In this charging method the billing items do not include charges due to ______.
Score 2
A. Computing
B. Data download
C. Data upload
D. Storage
正解：B

質問 2：
DataWorks can be used to create all types of tasks and configure scheduling cycles as needed. The supported granularity levels of scheduling cycles include days, weeks, months, hours, minutes and seconds.
A. False
B. True
正解：A

質問 3：
MaxCompute SQL is suitable for processing less real-time massive data, and employs a syntax similar to that of SQL. The efficiency of data query can be improved through creating proper indexes in the table.
Score 1
A. False
B. True
正解：A

質問 4：
DataWorks provides powerful scheduling capabilities including time-based or dependency-based task trigger mechanisms to perform tens of millions of tasks accurately and punctually each day based on DAG relationships. It supports multiple scheduling frequency configurations like: (Number of correct answers: 4) Score 2
A. By Hour
B. By Day
C. By Minute
D. By Week
E. By Second
正解：A,B,C,D

質問 5：
In order to improve the processing efficiency when using
MaxCompute, you can specify the partition when creating a
table. That is, several fields in the table are specified as
partition columns. Which of the following descriptions aboutMaxCompute partition table are correct?
(Number of correct
answers: 4)
A. In most cases, user can consider the partition to be the
directory under the file system
B. If the partition columns to be accessed are specified
when using data, then only corresponding partitions are
read and full table scan is avoided, which can improve the
processing efficiency and save costs
C. User can specify multiple partitions, that is, multiple
fields of the table are considered as the partitions of the
table, and the relationship among partitions is similar to
that of multiple directories
D. MaxCompute partition only supports string type and the
conversion of any other types is not allowed
E. The partition value cannot have a double byte characters
(such as ChinesE.
正解：A,B,C,E

質問 6：
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 7：
An enterprise uses Alibaba Cloud MaxCompute for storage of service orders, system logs and management data. Because the security levels for the data are different, it is needed to register multiple Alibaba Cloud accounts for data management.
Score 1
A. False
B. True
正解：A

質問 8：
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