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ACA-BigData1 ACA Big Data Certification Exam Questions and Answers

Questions 4

JindoFS in E-MapReduce provided by SmartData uses OSS as the storage back end.

Score 1

Options:

A.

True

B.

False

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Questions 5

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

Options:

A.

True

B.

False

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Questions 6

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

Options:

A.

Data upload

B.

Data download

C.

Computing

D.

Storage

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Questions 7

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

Options:

A.

after PAI experiments are created on PAI

B.

after PAI service is activated

C.

after MaxCompute service is activated

D.

Spark on MaxCompute Machine Learning project is created

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Questions 8

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 9

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

Options:

A.

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.

B.

Grant a specific operation permission to the user.

C.

If the user manages resources that have labels, such as datasheets and packages with datasheets,

grant label permissions to the user.

D.

The user need to create a project in simple mode

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Questions 10

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 11

A distributed file system like GFS and Hadoop are design to have much larger block(or chunk) size

like 64MB or 128MB, which of the following descriptions are correct? (Number of correct answers: 4)

Score 2

Options:

A.

It reduces clients' need to interact with the master because reads and writes on the same block( or

chunck) require only one initial request to the master for block location information

B.

Since on a large block(or chunk), a client is more likely to perform many operations on a given block, it

can reduce network overhead by keeping a persistent TCP connection to the metadata server over an

extended period of time

C.

It reduces the size of the metadata stored on the master

D.

The servers storing those blocks may become hot spots if many clients are accessing the same small

files

E.

If necessary to support even larger file systems, the cost of adding extra memory to the meta data

server is a big price

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Exam Code: ACA-BigData1
Exam Name: ACA Big Data Certification Exam
Last Update: Jan 19, 2021
Questions: 78

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