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ACA-BigData1 Sample Questions Answers

Questions 4

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

Options:

A.

Log Service

B.

DTS(Data Transmission Service)

C.

Message Service

D.

CloudMonitor

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Questions 5

In DataWorks table permission system, you can revoke permissions only on the fields whose security level is higher than the security level of your account.

Score 1

Options:

A.

True

B.

False

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Questions 6

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

Options:

A.

Stored as metadata on the NameNode

B.

Stored along with the data in HDFS

C.

Stored in the RDBMS like MySQL

D.

Stored in ZooKeeper

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Questions 7

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

Options:

A.

By Minute

B.

By Hour

C.

By Day

D.

By Week

E.

By Second

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Questions 8

The data development mode in DataWorks has been upgraded to the three-level structure

comprising of _____, _____, and ______. (Number of correct answers: 3)

Score 2

Options:

A.

Project

B.

Solution

C.

Business flow

D.

Directory

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Questions 9

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;

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Questions 10

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

Score 2

Options:

A.

task

B.

zero-load

C.

gateway

D.

agent

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Questions 11

Project is an important concept in MaxCompute. A user can create multiple projects, and each object

belongs to a certain project.

Score 1

Options:

A.

True

B.

False

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Questions 12

The FTP data source in DataWorks allows you to read/write data to FTP, and supports configuring

synchronization tasks in wizard and script mode.

Score 1

Options:

A.

True

B.

False

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Questions 13

Synchronous development in DataWorks provides both wizard and script modes.

Score 1

Options:

A.

True

B.

False

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Questions 14

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

Options:

A.

True

B.

False

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Questions 15

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.

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Questions 16

When odpscmd is used to connect to a project in MaxCompute, the command ______ can be

executed to view the size of the space occupied by table table_a.

Score 2

Options:

A.

select size from table_a;

B.

size table_a;

C.

desc table_a;

D.

show table table_a;

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Questions 17

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;

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Questions 18

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

Options:

A.

Full-Database Migration feature

B.

Configure a MySQL Reader plug-in

C.

Configure a MySQL Writer plug-in

D.

Add data sources in Bulk Mode

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Questions 19

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?

Options:

A.

Apache HUE

B.

Apache Zookeeper

C.

Apache Oozie

D.

Apache Spark

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Questions 20

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

Options:

A.

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

B.

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.

C.

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.

D.

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

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Questions 21

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

Options:

A.

Use DataWorks

B.

Use Intelij IDEA

C.

Use MaxCompute Console

D.

No supported tool yetc

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Questions 22

Which of the following task types does DataWorks support?

(Number of correct answers: 4)

Options:

A.

Data Synchronization

B.

SHELL

C.

MaxCompute SQL

D.

MaxCompute MR

E.

Scala

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Questions 23

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 ______.

Options:

A.

URL after the release

B.

URL in the preview

C.

MD5 code obtained after the release

D.

Jar package imported after the release

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Exam Code: ACA-BigData1
Exam Name: ACA Big Data Certification Exam
Last Update: Jun 17, 2024
Questions: 78
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