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Alibaba Cloud ACA-BigData1 ACA Big Data Certification Exam Exam Practice Test

ACA Big Data Certification Exam Questions and Answers

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Question 1

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

Options:

A.

True

B.

False

Question 2

In a scenario where a large enterprise plans to use MaxCompute to process and analyze its data, tens

of thousands of tables and thousands of tasks are expected for this project, and a project team of 40

members is responsible for the project construction and O&M. From the perspective of engineering,

which of the following can considerably reduce the cost of project construction and management?

Score 2

Options:

A.

Develop directly on MaxCompute and use script-timed scheduling tasks

B.

Use DataWorks

C.

Use Eclipse

D.

Use a private platform specially developed for this project

Question 3

One Alibaba Cloud account is entitled to join only one organization that uses DataWorks.

Options:

A.

True

B.

False

Question 4

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

Options:

A.

True

B.

False

Question 5

In MaxCompute command line, if you want to view all tables in a project, you can execute command:

______.

Score 2

Options:

A.

show tables;

B.

use tables;

C.

desc tables;

D.

select tables;

Question 6

A dataset includes the following items (time, region, sales amount). If you want to present the

information above in a chart, ______ is applicable.

Score 2

Options:

A.

Bubble Chart

B.

Tree Chart

C.

Pie Chart

D.

Radar Chart

Question 7

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

Options:

A.

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

or table partition each time.

B.

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.

C.

Resume: If an error occurs due to the network or the Tunnel service, you can resume transmission of

the file or directory after interruption.

D.

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

days.

Question 8

Scenario: Jack is the administrator of project prj1. A new team member, Alice (already has an Alibaba

Cloud account alice@aliyun.com), applies for joining this project with the following permissions: view

table lists, submit jobs, and create tables. Which of the following SQL statements is useless:

Score 2

Options:

A.

use prj1;

B.

add user aliyun$alice@aliyun.com;

C.

grant List, CreateTable, CreateInstance on project prj1 to user aliyun$alice@aliyun;

D.

flush privileges;

Question 9

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

Options:

A.

Spark on MaxCompute provides you with native Spark Web UIs.

B.

Different versions of Spark can run in MaxCompute at the same time.

C.

Similar to MaxCompute SQL and MaxCompute MapReduce, Spark on MaxCompute runs in the unified

computing resources activated for MaxCompute projects.

D.

Spark on MaxCompute has a separate permission system which will not allow users to query data

without any additional permission modifications required.

Question 10

By integrating live dashboards, DataV can present and monitor business data

simultaneously. This data-driven approach enables for well-organized data mining and

analysis allowing the user to seize new opportunities that otherwise might remain

hidden. It can support wide range of databases and data formats. Which of the following

options DataV does not support?

Options:

A.

Alibaba Cloud' s AnalyticDB, ApsaraDB

B.

Static data in CSV and JSON formats

C.

Oracle Database

D.

MaxCompute Project

Question 11

MaxCompute can coordinate multiple users to operate one project through ACL authorization. The

objects that can be authorized by ACL include ______. (Number of correct answers: 3)

Score 2

Options:

A.

Project

B.

Table

C.

Resource

D.

Procedure