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Alibaba Big data ACA-BigData1 Alibaba Cloud Study Notes

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Total 78 questions
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ACA Big Data Certification Exam Questions and Answers

Question 5

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 6

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)

Options:

A.

In most cases, user can consider the partition to be the

directory under the file system

B.

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

C.

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

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.

Question 7

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?

Options:

A.

Ingest with Hadoop streaming

B.

Ingest using Hive

C.

Ingest with sqoop import

D.

Ingest with Pig's LOAD command

Question 8

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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Total 78 questions
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