Alibaba Cloud ACA-BigData1 問題集

質問 1：
If a MySQL database contains 100 tables, and jack wants to migrate all those tables to MaxCompute using DataWorks Data Integration, the conventional method would require him to configure 100 data synchronization tasks. With _______ feature in DataWorks, he can upload all tables at the same time.
Score 2
A. Configure a MySQL Writer plug-in
B. Full-Database Migration feature
C. Add data sources in Bulk Mode
D. Configure a MySQL Reader plug-in
正解：C

質問 2：
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 3：
JindoFS in E-MapReduce provided by SmartData uses OSS as the storage back end.
Score 1
A. False
B. True
正解：B

質問 4：
MaxCompute is a fast and fully-managed TB/PB-level data warehousing solution provided by Alibaba Cloud. Which of the following product features are correct? ______ (Number of correct answers: 3) Score 2
A. Multi-level management and authorization
B. Efficient transaction processing
C. Distributed architecture
D. High security and reliability
E. Fast real-time response
正解：C,D,E

質問 5：
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 6：
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 7：
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 8：
MaxCompute tasks contain computational tasks and non-computational tasks. The computational tasks require actual operations on data stored in the table. MaxCompute parses the task to obtain its execution plan, and submits the task for execution. The noncomputational tasks require substantial reading of and modification to metadata information. Therefore, the task is not parsed, and no execution plan is provided. The task is directly submitted for execution. The latter one has a faster response speed than the former one. Which of the following operations on the table t_test is a computational task?
A. select count(*) from t_test;
B. desc t_test
C. alter table t_test add columns (comments string);
D. truncate table t_test;
正解：A