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HCIA-Big Data V3.0 Questions and Answers

Question 1

Capacity schedulingThe processor allocates resources for each queue, which of the followingOptionsis in the queueresourcescheduleStrategy?

Options:

A.

Fair

B.

Capacity

C.

FIFO

D.

Mesos

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Question 2

When using Loaderi for data import and export, data processing must go through the Reducel stage

Options:

A.

True

B.

False

Question 3

All Zookeeper nodes can process requests

Options:

A.

True

B.

False

Question 4

About HDFSThe function of the NameNode, which one of the following descriptions is wrong?

Options:

A.

for storing metadata

B.

Save the mapping relationship between file blocks and DataNodes

C.

MaintenanceThe mapping relationship between Block ID and DataNode local file

D.

Store file content

Question 5

Which of the following scenarios are not good at Flink components?

Options:

Question 6

The label-based scheduling of YARN is to label which of the following options?

Options:

A.

ResourceNanager

B.

Container

C.

Appllaster

D.

NodeManager

Question 7

Which of the following options are Huawei's data center solutions?

Options:

A.

Data Lake Governance Center DGC

B.

Cloud operating system FusionSphere Openstack

C.

AI development platform ModelArts

D.

Video Analysis VAS

Question 8

In Streaming, exactly one message reliability level is achieved through the ACK mechanism.

Options:

A.

True

B.

False

Question 9

Synchronizing data between partition replication in Kafka, copying data from the leader of the partition to the follower requires a thread (replicationFetcherThread) follower (a follower is equivalent to a consumer) to actively pull messages from the leader in batches, which greatly improves throughput.

Options:

A.

True

B.

False

Question 10

On the Fusioninsight Manager interface, when an alarm of insufficient disk capacity of Kafka is received, and the cause of the alarm has been eliminated from the hard disk hardware failure, the system administrator needs to consider expanding the capacity to solve this problem.

Options:

A.

True

B.

False

Question 11

A typical Katka cluster contains several Producers, several Brokers, several Consumers and a ZooKeeper cluster.

Options:

A.

True

B.

False

Question 12

What is the module used to manage the active and standby states of the Loader Server process in Loader?

Options:

A.

ResourcesManager

B.

HAManager

C.

Job Manager

D.

Job Scheduler

Question 13

Fusioninsight Spark SQL, like the community Spark JDBCServer, only supports single-tenant binding to a YARN resource queue and multi-tenancy, and does not support multi-tenant parallel execution.

Options:

A.

True

B.

False

Question 14

Watermark is a mechanism proposed by Apache Flink to process EventTime window calculation, which is essentially a timestamp.

Options:

A.

True

B.

False

Question 15

A telecommunications companyplanopenexhibitionBigdatabusiness,target businesshavecustomer grouping,calendarHistorical bill analysis, real-time call charge analysis and other services. Which of the following options is the most appropriate in terms of functionality and cost to meet business needs?

Options:

A.

Deploy Soark separately

B.

Deploy Map Rabace

C.

Deploy Storm

D.

Deploy MapReduce with Stare

Question 16

If you want to add 1 to the digital value stored in the Key, which command should you use?

Options:

Question 17

Which of the following parts does the structure of the unified certification management system include?

Options:

A.

Unified Authentication Server

B.

Unified authentication management module

C.

Identity information storage server

D.

Unified Session Management Module

Question 18

In big data computing tasks, aboutI0Which of the following is an incorrect description of an intensive task?

Options:

A.

CHigh PU consumption

B.

I0During intensive task execution, most of the time is spent in I0deal with

C.

By improving network transmission efficiency and read and write efficiency, performance can be greatly improved

D.

The more tasks, the more efficient the CPU

Question 19

In Spark On YARN mode, the node without NodeManager cannot start the executor to execute the Task

Options:

A.

True

B.

False

Question 20

When creating a Loader job, in which of the following steps can the number of Maps be set?

Options:

Question 21

Which of the following descriptions about Hive are correct?

Options:

A.

supportTez, Spark and other computing engines

B.

Can query and manage petabytes of distributed data

C.

E for dataTL process automation

D.

Direct access to HDFS files and HBase

Question 22

What is wrong with the description of the TWink capacity mechanism?

Options:

A.

Che? ?Mechanism guarantees an internship? ?Runtime,? ?

B.

Save?mechanism guarantees real-time?run?,? ?

C.

Save?mechanism to ensure that the program is running?After the situation, from the saved state?

D.

Check?mechanism ensures that the program has?After the situation,?from a saved state?

Question 23

ChannelE acts like a queue and is used to temporarily cache incoming data. When the sink successfully sends the data to the next-hop Channel or the final destination, the data will be removed from the Channel

Options:

A.

True

B.

False

Question 24

BloomFilter of HBase is used to filter data.

Options:

A.

True

B.

False

Question 25

What types of data sources does F1ink stream processing include?

Options:

A.

Socket streams

B.

JDBC

C.

Files

D.

Ccollections

Question 26

F1ink has no restart strategy.

Options:

A.

True

B.

False

Question 27

In the Fusioninsight HD system, a Loader node in the cluster is abnormal. If other services are not abnormal, the normal use of the Loader service function will not be affected.

Options:

A.

True

B.

False

Question 28

ElasticSearch is strongly dependent on Zookeeper.

Options:

A.

True

B.

False

Question 29

Redis supports multiple databases.

Options:

A.

True

B.

False

Question 30

The most basic unit of HBase's distributed storage is Region.

Options:

A.

True

B.

False

Question 31

Hive comparisonAtWhat are the advantages of a traditional data warehouse?

Options:

A.

Data is stored in HDFS. High reliability and high fault tolerance

B.

Integrate a complete set of mature reporting solutions, which can be more convenient for data analysis

C.

sooEfficient lead processing

D.

Less hardware dependent, adaptableordinarythe machine

Question 32

The core concept of MapReduce is to decompose a large computing task into each node of the cluster to make full use of cluster resources to shorten the running time.

Options:

A.

True

B.

False

Question 33

Neither Spark nor Hadoopi are suitable for iterative computing scenarios.

Options:

A.

True

B.

False

Question 34

Which of the following is not a core element of KrbServer?

Options:

A.

KDC (Key Distribution Center)

B.

Kerberos Client

C.

Kerberos KDC Client

D.

Kerberos KDC Server

Question 35

Which component controls the primary and secondary arbitration of NameNodef in HDFS

Options:

A.

HDFS Client

B.

NodeManager

C.

ResourceManager

D.

ZooKeeper Failover Controller

Question 36

Fusioninsight Hadoop:In the cluster, query through df-hT on a node. The partitions you see include the following: /var/log/srv/BigData/srv/BigData/hadoop/data5/srv/BigData/solr/solrserver3/What is the optimal RAID level planning combination for the disks corresponding to the srv/BigData/dbdadom partitions?

Options:

A.

Raido Raid1 Raido Non-Raidl

B.

Raidl Raid1 Non-RaidNon-Raid Raidl

C.

Raido raido Raido Raido raid0

D.

Non-Raid Non-Raid Non-Raid Non-Raid Raid1

Question 37

In the Fusioninsight HD product, which statement about Kafka is incorrect?

Options:

A.

Kafka strongly depends on Zookeeper

B.

The number of instances deployed by Kafka must not be less than 2

C.

Kafkal server can generate messages

D.

Consumer consumes messages as the client role of Kafkal

Question 38

The Fusioninsight HD cluster planned by a bank has 90 nodes. If three control nodes are planned, it is recommended to plan only one data node in the cluster.

Options:

A.

87

B.

85

C.

90

D.

86

Question 39

Which of the following is not a mandatory option when creating a Loader job?

Options:

A.

name

B.

connect

C.

type

D.

priority

Question 40

Which two roles are responsible for the active and standby status management of HDFS NameNode nodes and the merging of metadata files?

Options:

A.

ZKFC and standby NameNode

B.

Primary NameNode and Standby NameNode

C.

ZKFC and the main NameNode

D.

Primary NameNode and JournalNode

Question 41

What is the index name of ElasticSearch?

Options:

A.

ddcvc

B.

doc

C.

logstash-2020.01.17

D.

3sDqsm8Bu-kTplzOjqhL

Question 42

Regarding the relationship between Hive and other components of Hadoop. Which of the following descriptions is wrong?

Options:

A.

Hive finally stores data in HDFS

B.

Hive is a data warehouse tool for the Hadoop platform

C.

HQL can execute tasks through MapReduce

D.

Hive has a strong dependence on HBase

Question 43

SoIrCloud mode is cluster mode. In this modeSWhich of the following services does the olr server strongly depend on?

Options:

A.

HBase

B.

HDFS

C.

ZooKeeper

D.

YARN

Question 44

F1ink in( )interface for streaming data processing,( )interface for batch processing?

Options:

A.

Datastream API, DataSet API

B.

Data batch API.DataStream API

C.

Stream API.Batch API

D.

Batch API, Stream API

Question 45

Which of the following statements about ZKFC is wrong?

Options:

A.

ZKFC (ZKFailoverController) is used as a Zookeeper cluster client to monitor the status information of NameNodel

B.

The ZKFC process needs to be deployed in NameNodel's node and Zookeeper's Leader node

C.

Standby NameNodej perceives the status of Active NameNodel through Zookeeper. Once the Active NameNode is down, the Standby NameNode will perform the main upgrade operation.

D.

The ZKFC of HDFS NameNodel connects to Zookeeper, and saves the host name and other information in Zookeeper

Question 46

Which of the following descriptions about Hive features is incorrect?

Options:

A.

Flexible and convenient ETL

B.

Only supports MapReduce computing engine

C.

Direct access to HDFS files and HBase

D.

Easy to use and easy to program

Question 47

In the Hadoop platform, to view the information of an application in the YARN service, what command is usually needed?

Options:

A.

container

B.

jar

C.

application-attempt

D.

Aapplication

Question 48

What application scenarios is HBase not suitable for?

Options:

A.

High throughput application scenarios

B.

Application scenarios requiring full ACD characteristics

C.

Semi-structured data application scenarios

D.

Mass data (TB, PB) application scenarios

Question 49

Which object cannot be managed by Fusioninsight manager?

Options:

A.

Spark

B.

host OS

C.

YARN

D.

HDFS

Question 50

Which of the following factors contributed to the vigorous development of the era of big data?

Options:

A.

Reduced hardware costs and increased network bandwidth

B.

The rise of cloud computing

C.

The popularization of smart terminals and the improvement of social demands

D.

all of the aboveA. True

Question 51

How many blocks are saved in HDFS by default in the FusionlnsightHD system?

Options:

A.

3

B.

2

C.

1

D.

uncertain

Question 52

When creating a Loaderf job, in which of the following steps can the filter type be set?

Options:

A.

input settings

B.

convert

C.

output

D.

Basic Information

Question 53

Regarding DataSet, which of the following statements is incorrect?

Options:

A.

A DataSet is a strongly typed collection of domain-specific objects

B.

DataSet can perform most operations without deserialization

C.

DataSet needs to be deserialized to perform operations such as sort, filter, shuffle, etC.

D.

DataSet - highly similar to RDD. Better performance than RDD

Question 54

In the Fusioninsight HD system, which component does the flume data flow not need to pass through in the node?

Options:

A.

sink

B.

topic

C.

Source

D.

Channel

Question 55

The picture below shows Sparke&MapReduce performance comparison data, it can be concluded that compared with MapReducei computing, Spark uses( )resources, get( )double the performance?

Options:

A.

1/8, 3

B.

1/10, 3

C.

1/10, 4

D.

1/8, 4

Question 56

Which module is responsible for Fusioninsight Manager user data storage?

Options:

A.

CAS

B.

AOS

C.

Kerberos

D.

LDAP

Question 57

In the F1ink technical architecture,( )is a computing engine for stream processing and batch processing

Options:

A.

Standalone

B.

Runtime

C.

DataStream

D.

FlinkCore

Question 58

Kafka cluster during runtime,Directly depend on the following components?

Options:

A.

Zookeeper

B.

HDFS

C.

Spark

D.

HBase

Question 59

Which command in Redis is to view the remaining lifetime of a key?

Options:

A.

persist

B.

expire

C.

ttl

D.

expireat

Question 60

What kind of computing tasks are the MapReduces components in Hadoop good at?

Options:

A.

Iterative calculation

B.

Offline computing

C.

real-time interactive computing

D.

Streaming Computing

Question 61

Which statement is correct about the client uploading files to the HDF$ file system in the Hadoop system?

Options:

A.

The file data of the client is passed to the DataNode through the NameNode

B.

Allows the client to divide the file into multiple blocks, according to DaThe address information of taNodel is entered into each DataNode in order

C.

The client writes the entire file to each DataNodel in sequence according to the address information of the DataNode, and then divides the file into multiple blos by the DataNode)ck

D.

The client only uploads data to one DataNode, and then the NameNodet is responsible for block replication

Question 62

Which of the following descriptions about Hive log collection on the Fusioninsight Manager interface is incorrect?

Options:

A.

You can specify a specific user for log collection, for example, only download logs generated by UserA.

B.

You can specify a time period for log collection, for example, only collect logs from 2016-1-1 to 2016-1-10.

C.

You can specify an instance for log collection, for example, specify to collect metstore logs.

D.

The node IP can be specified for log collection, for example, only the logs of a certain IP can be downloaded.

Question 63

In Hadoop, if yarn.scheduler.capacity.root.QueueA. minimum-user-limit-percenti is set to 50, which of the following statements is wrong?

Options:

A.

A user-submitted task can use 100% of QueueA's resources

B.

Each user in QueueA can only get up to 50% of the resources

C.

If there are already 2 user tasks running in QueueA, then the task submitted by the third user needs to wait for the release of resources

D.

QueueA must ensure that each user gets at least 50% of the resources

Question 64

In the task scheduling process of YARN, which of the following is the task that ApplicationMastert is responsible for?

Options:

A.

Apply for and receive resources

B.

Set up the running environment for the task

C.

Allocate Container

D.

Start a Map or Reduce task

Question 65

Which of the following is not included in the schemai authentication method of Zookeeper?

Options:

A.

sasl

B.

auth

C.

digest

D.

world

Question 66

The following descriptions about Kafkaf are wrong( )

Options:

A.

Used as the basis for activity streams and operational data processing pipelines

B.

Developed by Apache Hadoop and open sourced in 2011

C.

It has the characteristics of information persistence, high throughput, real-time, etC.

D.

Implemented using Scala, Java language

Question 67

In Hive, which of the following descriptions about bucketing is correct?

Options:

A.

Data can put different data into different buckets according to the way of buckets

B.

Unsortable in bucket

C.

The advantage of bucketing is that it can achieve higher query processing efficiency and make sampling more efficient

D.

You can specify the number of buckets when creating a table

Question 68

What steps are included in the preparation for Fusioninsight HD installation?

Options:

A.

Complete the hardware installation

B.

Complete the node host OS installation

C.

Prepare tools and software. Such as Putty, LLD, Fusioninsight HD software installation package, etC.

D.

Prepare planning data. such as network parameters and role deployment locations

Question 69

Which of the following descriptions about the deployment of big data components on Kunpeng and X86 servers is correct?

Options:

A.

No shortcomings in performance

B.

Single component (for example: HDFS) supports mixed deployment of Kunpeng server and X86 server

C.

Supports mixed deployment of Kunpeng servers and ordinary X86 servers in a single cluster

D.

Realize the autonomous control of some equipment

Question 70

About Spark SQL&Hive difference and connection, which of the following statements is correct?

Options:

A.

Spark SQL is compatible with most Hive syntax and functions

B.

Spark SQL cannot use Hive's custom functions

C.

The execution engine of Spark SQL is Spark core, HiveThe default execution engine is MapReduce

D.

Spark SQL relies on Hive metadata

Question 71

Which of the following are the optimization methods of Redis?

Options:

A.

Reduced key-values

B.

Turn off persistence

C.

Limit Redis memory size

D.

slowlog configuration

Question 72

Which of the following belongs to DDL (Data Definition Language) in Hive SQL?

Options:

A.

Modify table

B.

delete table

C.

build table

D.

data import

Question 73

Which of the following statements about Zookeeper's Leaderi election is correct?

Options:

A.

When the number of instances n is an odd number, assuming n=2x+1, it takes x+l votes to become a leader node

B.

When Zookeeperj elects leaderE, it needs more than half of the votes

C.

When the number of instances is 8, it takes 5 votes to become the leader node. The disaster recovery capability is 4

D.

When the number of instances n is an odd number, assuming n=2x+1, it takes x votes to become a leader node

Question 74

SELECT aa.salarybB. address FROM employee aa JoiN SELECT adress FROM employee info where provine='zhejiang') What types of operations does bb ONaa.nanme=bB. name contain?

Options:

A.

create table

B.

Import Data

C.

subquery

D.

JOIN Cha Xun

Question 75

What modules does the Spark framework include?

Options:

A.

Spark SQL

B.

Spark Streaming

C.

Spark GraphX

D.

Spark Mllib

Question 76

Which of the descriptions of the Loader job in FusionlnsightHD is correct?

Options:

A.

After the Loader submits the job to Yam for execution, if the Loader service is abnormal at this time, the job execution fails.

B.

After the Loader submits the job to Yam for execution, if a Mapper task fails to execute, it can automatically retry

C.

After the Loadet job fails to execute, garbage data will be generated, which needs to be cleared manually by the user

D.

Loader submits a job to Yam for execution. No other jobs can be submitted until the job is executed.

Question 77

Among the following options, which are the processes that MapReduce will have?

Options:

A.

Ccombine

B.

Map

C.

Reduce

D.

Partition

Question 78

Which of the following commands are of type set?

Options:

A.

scard

B.

sunion

C.

zcount

D.

hexists

Question 79

Which of the following statements about the interaction between F1ink and other components is correct?

Options:

A.

The implementation of Flink's checkpoint relies on Zookeeper

B.

Flink can send received components to Kafka

C.

The running of Flink tasks relies on YARN for resource scheduling and management

D.

Flink reads and writes data in HDFS file system

Question 80

What are the performance bottlenecks of traditional data processing?

Options:

A.

High cost of data storage

B.

Insufficient streaming data processing performance

C.

Limited scalability

D.

Batch data processing is missing

Question 81

Which of the following contents can be viewed in the Loader historical job record?

Options:

A.

job status

B.

Job start/run time

C.

dirty data link

D.

Error lines/number of files

Question 82

In Huawei's big data solution, which of the following components are included in the hadoop layer?

Options:

A.

Miner

B.

Spark

C.

Hive

D.

Flink

Question 83

In a Fusioninsight HD V100R002C60 cluster, which of the following components need to be partitioned for metadata?

Options:

A.

HDFS

B.

Zookeeper

C.

Streaming

D.

Redis

E.

HBase-F Kafka

Question 84

What are the storage formats supported by Hive?

Options:

A.

TextFile

B.

RCFile

C.

Parquet

D.

SequenceFile

Question 85

Which of the followingOSWhich version is recommended for building a Fusioninsight V1R2C60 cluster?

Options:

A.

SUSE11 SP1/SP2/SP3 for AMD64&Inter64

B.

CentOS6.6

C.

redhat-6.4-x86_64

D.

RedHat-6.5-x86_64

E.

RedHat-6.7-x86_64F Ubuntu6.3

Question 86

Which of the following conversion rules can be implemented by Loader

Options:

A.

Null conversion

B.

splice conversion

C.

long time conversion

D.

Incremental conversion

Question 87

What can the unified certification management system of mainstream manufacturers consist of?

Options:

A.

Unified Authentication Server

B.

Unified authentication management module

C.

Unified Safety Management System

D.

Identity information storage server

Question 88

Starting from version 2.7.3 of HDFS, what is the default Block Size?

Options:

A.

32MB

B.

128MB

C.

64MB

D.

16MB

Question 89

Which of the following destinations can Fusioninsight HD Loader export HDFS data to?

Options:

A.

SFTP server

B.

FTP server

C.

Oracle Database

D.

DB2 database

Question 90

Which of the following options is an advantage of Kerberos?

Options:

A.

prevent replay attacks

B.

Has high performance

C.

Support two-way authentication

D.

Able to prevent brute force

Question 91

The following descriptions about FusionInsight multi-tenant management are correct

Options:

A.

One-stop management of tenant resources, computing resources (CPU/memory/IO), storage resources (HDFS), service resources (HBase.…)

B.

Visual multi-level tenant management, matching with the enterprise organizational structure, simplifies system resource allocation and management

C.

Tenant resource isolation based on container mechanism, escorting tenant SLA

D.

A multi-level tenant model that matches the organizational structure of the enterprise, different departments correspond to different tenants, and tenants can be dynamically added or deleted as needed

Question 92

The compatibility of F1ink is reflected in which of the following aspects?

Options:

A.

Can be mixed with Hadoop's original mappers and reducers

B.

YARN can be used as a resource scheduling manager for Flink clusters

C.

Ability to use Hadoop formatted input and output

D.

Ability to get more data from local

Question 93

Which of the following statements about the comparison of Sparkstreamingi and Streaming is incorrect?

Options:

A.

SparkStreaming:It is a micro-batch framework, and events need to be processed when they are exhausted to a certain amount

B.

The execution logic of Streamingl is to start immediately, and then recycle after running.

C.

The throughput of SparkStreaming is about 2-5 times that of Streaming

D.

SparkStreaming event processing latency is higher than Streaming

Question 94

What data will Fusioninsight Manager regularly back up?

Options:

A.

NameNode

B.

LDAP

C.

OMS

D.

DBService

Question 95

Which of the following RESTful request methods belong to ElastieSearch?

Options:

A.

Update

B.

Delete

C.

Get

D.

Post

Question 96

In the Fusioninsight product, which statement is correct about the Kafka component?

Options:

A.

When creating a topic, the number of replicas must not be greater than the number of currently surviving Broker instances, otherwise the topic creation will fail

B.

When the Producer of Kafkal sends a message, it can specify which Consumer consumes the message

C.

Kafka will store metadata information in Zookeeper for

D.

After Kafka is installed, the sensitive data storage directory cannot be configured.

Question 97

Which of the following scenarios in HBase will trigger the F1ush operation?

Options:

A.

HBasePeriod refreshMemstore, silentthink period is 1Hour

B.

When the number of files in WALs reaches a threshold

C.

The total size of the MemStore in the Region has reached the preset Flush Size threshold

D.

The ratio of the total memory occupied by the MemStore to the total memory of the RegionServer exceeds the preset threshold size

Exam Detail
Vendor: Huawei
Certification: HCIA-Big Data
Exam Code: H13-711_V3.0
Exam Name: HCIA-Big Data V3.0
Last Update: Dec 22, 2024
H13-711_V3.0 Question Answers
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