AliCloud ACA-BIGDATA1 ACA Big Data Certification Exam Online Training

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1. A business flow in DataWorks integrates different node task types by business type, such a structure

improves business code development facilitation.

Which of the following descriptions about the node type is INCORRECT? Score 2

A zero-load node is a control node that does not generate any data. The virtual node is generally used as the root node for planning the overall node workflow.

An ODPS SQL task allows you to edit and maintain the SQL code on the Web, and easily implement code runs, debug, and collaboration.

The PyODPS node in DataWorks can be integrated with MaxCompute Python SD

You can edit the Python code to operate MaxCompute on a PyODPS node in DataWorks.

The SHELL node supports standard SHELL syntax and the interactive syntax. The SHELL task can run on the default resource group

2. DataV is a powerful yet accessible data visualization tool, which features geographic information systems allowing for rapid interpretation of data to understand relationships, patterns, and trends. When a DataV screen is ready, it can embed works to the existing portal of the enterprise through ______.

URL after the release

URL in the preview

MD5 code obtained after the release

Jar package imported after the release

3. DataWorks can be used to develop and configure data sync tasks.

Which of the following statements are correct? (Number of correct answers: 3) Score 2

The data source configuration in the project management is required to add data source

Some of the columns in source tables can be extracted to create a mapping relationship between fields, and constants or variables can't be added

For the extraction of source data, "where" filtering clause can be referenced as the criteria of incremental synchronization

Clean-up rules can be set to clear or preserve existing data before data write

4. You are working on a project where you need to chain together MapReduce, Hive jobs. You also need the ability to use forks, decision points, and path joins.

Which ecosystem project should you use to perform these actions? Score 2

Spark

HUE

Zookeeper

Oozie

5. 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

Data upload

Data download

Computing

Storage

6. In MaxCompute, if error occurs in Tunnel transmission due to network or Tunnel service, the user can resume the last update operation through the command tunnel resume; Score 1

True

False

7. You are working on a project where you need to chain together MapReduce, Hive jobs. You also need the ability to use forks, decision points, and path joins.

Which ecosystem project should you use to perform these actions?

Apache HUE

Apache Zookeeper

Apache Oozie

Apache Spark

8. Where is the meta data(e.g.,table schemas) in Hive? Score 2

Stored as metadata on the NameNode

Stored along with the data in HDFS

Stored in the RDBMS like MySQL

Stored in ZooKeeper

9. Scenario: Jack is the administrator of project prj1. The project involves a large volume of sensitive data such as bank account, medical record, etc. Jack wants to properly protect the data.

Which of the follow statements is necessary?

set ProjectACL=true;

add accountprovider ram;

set ProjectProtection=true;

use prj1;

10. Resource is a particular concept of MaxCompute. If you want to use user-defined function UDF or MapReduce, resource is needed. For example: After you have prepared UDF, you must upload the compiled jar package to MaxCompute as resource.

Which of the following objects are MaxCompute resources? (Number of correct answers: 4)

Score 2

Files

Tables: Tables in MaxCompute

Jar: Compiled Java jar package

Archive: Recognize the compression type according to the postfix in the resource name

ACL Policy

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11. Which of the following is not proper for granting the permission on a L4 MaxCompute table to a user. (L4 is a level in MaxCompute Label-based security (LabelSecurity), it is a required MaxCompute Access Control (MAC) policy at the project space level. It allows project administrators to control the user access to column-level sensitive data with improved flexibility.) Score 2

If no permissions have been granted to the user and the user does not belong to the project, add the user to the project. The user does not have any permissions before they are added to the project.

Grant a specific operation permission to the user.

If the user manages resources that have labels, such as datasheets and packages with datasheets, grant label permissions to the user.

The user need to create a project in simple mode

12. Synchronous development in DataWorks provides both wizard and script modes. Score 1

True

False

13. Alibaba Cloud Quick BI reporting tools support a variety of data sources, facilitating users to analyze

and present their data from different data sources. ______ is not supported as a data source yet. Score 2

Results returned from the API

MaxCompute

Local Excel files

MySQL RDS

14. 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)

In most cases, user can consider the partition to be the directory under the file system

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

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

MaxCompute partition only supports string type and the conversion of any other types is not allowed

The partition value cannot have a double byte characters (such as Chinese.

15. MaxCompute takes Project as a charged unit. The bill is charged according to three aspects: the usage of storage, computing resource, and data download respectively. You pay for compute and

storage resources by the day with no long-term commitments. Score 1

True

False

16. 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

after PAI experiments are created on PAI

after PAI service is activated

after MaxCompute service is activated

Spark on MaxCompute Machine Learning project is created

17. 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

DataService Studio is connected to API Gateway. Users can deploy APIs to API Gateway with oneclick.

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.

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.

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

18. Your company stores user profile records in an OLTP databases. You want to join the serecords with web server logs you have already ingested into the Hadoop file system.

What is the best way to obtain and ingest these user records?

Ingest with Hadoop streaming

Ingest using Hive

Ingest with sqoop import

Ingest with Pig's LOAD command

19. A Log table named log in MaxCompute is a partition table, and the partition key is dt. Anew partition is created daily to store the new data of that day. Now we have one month's data, starting from dt='20180101' to dt='20180131', and we may use ________ to delete the data on 20180101.

delete from log where dt='20180101'

truncate table where dt='20180101'

drop partition log (dt='20180101')

alter table log drop partition(dt='20180101')

20. There are multiple connection clients for MaxCompute, which of the following is the easiest way to configure workflow and scheduling for MaxCompute tasks? Score 2

Use DataWorks

Use Intelij IDEA

Use MaxCompute Console

No supported tool yetc

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21. There are three types of node instances in an E-MapReducecluster: master, core, and _____ . Score 2

task

zero-load

gateway

agent

22. 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. Score 1

True

False

23. 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?

tunnel upload log.txt t_log/p1="b1”, p2="b2"

tunnel upload log.txt t_log/(p1="b1”, p2="b2")

tunnel upload log.txt t_log/p1="b1"/p2="b2"

24. In MaxCompute, you can use Tunnel command line for data upload and download.

Which of the following description of Tunnel command is NOT correct: Score 2

Upload: Supports file or directory (level-one) uploading. Data can only be uploaded to a single table or table partition each time.

Download: You can only download data to a single file. Only data in one table or partition can be downloaded to one file each time. For partitioned tables, the source partition must be specified.

Resume: If an error occurs due to the network or the Tunnel service, you can resume transmission of the file or directory after interruption.

Purge: Clears the table directory. By default, use this command to clear information of the last three days.

25. If a task node of DataWorks is deleted from the recycle bin, it can still be restored.

True

False

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