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Alibaba Big data ACA Big Data Certification Exam

ACA Big Data Certification Exam

Last Update Jul 24, 2024
Total Questions : 78

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Questions 4

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

Discussion 0
Questions 5

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

Score 1

Options:

A.  

True

B.  

False

Discussion 0
Questions 6

If the DataWorks(MaxCompute) tables in your request belong to two owners. In this case, Data

Guard(DataWorks component) automatically splits your request into two by table owner.

Score 1

Options:

A.  

True

B.  

False

Discussion 0
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Questions 7

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

Discussion 0

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