Huawei Real Dumps Practice Exam Questions by Dumpswarp

HCIA-Big Data V3.0 Questions and Answers

Question 1

F? ?Include? ?Second major?, the following are about these two? ?Which one is it?

Options:

?to the next?of? ?recognize?

?acting on an exact?

? ?or by?special mechanism?,and?Piece?

?file transactions,?of?

Question 2

Flink is a computing framework that combines batch processing and stream processing. Its core is a stream data processing engine for data classification and parallel computing.

Options:

True

False

Question 3

The following is for the LdapSearer organization?Type statement is correct

Options:

Each node in the LdapSearer directory is called?day, and?has its own uniquely distinguishable name?IN (Distingarl shed Mama)

Specific objects cannot be defined under organizational units.

LdapSearer directory information is based on? ?structure to carry out?woven and stored.

The tree of the LdapSearer directory tree generally defines the domain name dc (Dcmain Compen?)

Question 4

Fusionin, a graphical health inspection tool The sight Tool consists of FusionCare and SysCheckerp.

Options:

True

False

Question 5

Flink supports Localt mode and Clustert mode deployment. Other modes are not supported at the moment.

Options:

True

False

Question 6

Fl?Me is akind of distributed. highreliable and highavailableofClothesservice. useto be effectivecompare?,polymerization?Move a lot of logs? ?.

Options:

TRUE

FALSE

Question 7

In MapReduce programming, code not only describes what to do, but also how to do it.

Options:

True

False

Question 8

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

Options:

CHigh PU consumption

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

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

The more tasks, the more efficient the CPU

Question 9

In the Fusioninsight HD system, if dirty data is generated while the Loader job is running, the status of the Loader job execution result must be failed.

Options:

True

False

Question 10

BloomFilter of HBase is used to filter data.

Options:

True

False

Question 11

In the replica placement strategy of HDFS, what is the distance between different servers in the same rack?

Options:

Question 12

RedisThe commands in are case-sensitive.

Options:

TRUE

FALSE

Question 13

Similar to Spark Streaming, Flink is an event-driven real-time streaming system

Options:

True

False

Question 14

The client writes data to any Zookeeper node. Zookeeper needs to fully synchronize the data to other nodes before returning to the client to write successfully.

Options:

True

False

Question 15

Flume supports cascading multiple Flume, and at the same time, the cascade node supports old data replication.

Options:

TRUE

FALSE

Question 16

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

Options:

Question 17

Fusioninsight is Huawei's unified platform for enterprise-level big data storage, query, and analysis. It can help enterprises quickly build massive data information processing systems, and discover new value points and business opportunities through real-time and non-real-time analysis and mining of massive information data.

Options:

True

False

Question 18

In the flume architecture, a Source can be connected to multiple channels.

Options:

True

False

Question 19

In the Fusionlnsight HD product, a typical Kafka cluster contains several Producers, several Borkers, several Consumers and a Zookeeper cluster

Options:

True

False

Question 20

The checkpoint mechanism in Flink continuously draws snapshots of streaming applications. The state snapshots of streaming applications can only be saved in the HDFS file system

Options:

True

False

Question 21

Neither Spark nor Hadoopi are suitable for iterative computing scenarios.

Options:

True

False

Question 22

HBasetable design, column families andRowKeyIt is an important part of table design. Which of the following options is not suitableDoRowKey?

Options:

identity number

username

handmachine number

userID

Question 23

All Zookeeper nodes can process requests

Options:

True

False

Question 24

Generated when RDDs have width and narrow dependencies ( ), which reduces cluster performance.

Options:

Question 25

Which of the following are the built-in string functions of Hive?

Options:

trim()

abs ()

substr()

length()

Question 26

Elastic SearchofSowleadCanbystoragein a variety ofstorage classtype,andthe followingwherekind of storagekindtypebranchhold?

Options:

Shared file system

Object Storage

HDFS

Local file system

Question 27

Redis supports multiple databases.

Options:

True

False

Question 28

The job of Loader fails to execute, and the imported data will not be deleted automatically, and must be deleted manually.

Options:

True

False

Question 29

By configuring which of the following parameters can the logs generated in Kafkal be cleaned up?

Options:

log.retention.bytes

server.properties

log.cleanup.policy

log.retention.hours

Question 30

The index data of ElasticSearch can only be stored in the HDFS system.

Options:

True

False

Question 31

Kafka, as a distributed message system, supports online and offline message processing, and provides javaAPIl for other components to use together. In the Fusioninsight solution, Kafka belongs to the Fusioninsight HD module.

Options:

True

False

Question 32

In the replica placement strategy of HDFS, what is the distance between different servers in the same rack?

Options:

Question 33

inDGGplatformshelfunder constructioncarryfor? ?Enterprise grouparity ofAccording to management. Data asset management is visualized and supported? ?,? ?Wait. through data? ?, the realization material? ?view visible. Provide data intelligent search and operation?The number of modules to be controlled is ( ).

Options:

Data Development

Specification design

Data Integration

Data Asset Management

Question 34

Which of the following statements about ZKFC is wrong?

Options:

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

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

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.

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

Question 35

Which of the following is not a role or service involved in the process of reading data in HBasei?

Options:

HDFS

Zookeeper

HMaster

HRegionServer

Question 36

What is the file format of data storage in HBase?

Options:

HFile

HLog

TextFile

SequenceFile

Question 37

Which of the following descriptions about the features of Zookeeper is wrong?

Options:

Updates sent by the client are applied in the order in which they were sent

A message is to be received by more than half-respected servers,he will be able to successfully write to disk

A message update can only succeed or fail. There is no intermediate state

The number of Zookeeper nodes must be odd

Question 38

A user information table meg is saved in HBaser of Fusioninsight HD_table, Rowkey is the user id, one of which is the name of the user, now write three KeyValues to this column in sequence:001:Li, 001:Mary001:Lily, may I ask scanmeg_table', (VERSION=>2) which pieces of data will be returned?

Options:

001:Lily

001:Li

001:Mary, 001:Lily

001:Li, 001:Mary, 001:Lily

Question 39

As shown in the figure, the following description of the message read by the Kafka message consumer Consumeri is wrong?

Options:

The blue in the picture is a topic of Kafkal, which can be understood as a queue, and each grid represents a message.

The messages generated by the producer are placed at the end of the topic one by one.

Consumers read messages sequentially from right to left.

Consumert uses offset to record the position of the read

Question 40

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

Options:

After the Loader submits the job to YARN for execution, if the Loade phase is abnormal at this time, the job fails to execute.

The Loader submits the job to the small YARN for execution. If a Mapper task fails to execute, it can automatically retry

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

After the Loader submits a job to YARN for execution, other jobs cannot be submitted until the job is executed.

Question 41

Which of the following descriptions about Kafka partition offset is incorrect?

Options:

Consumers track records by (offset, partition, topic)

Uniquely tag a message

offset is a String type string

The position of each message in the file is called offset

Question 42

The figure below shows the data transmission architecture of flume. What is the component at the "?" in the figure?

Options:

Interceptor

Channel processor

Channel selector

None of the aboveA. True

Question 43

Which of the following HDFS commands can be used to check the integrity of data blocks?

Options:

HDFS fsck

HDFS fsck-delete

HDFS dfsadmin -report

HDES balancer -threshold 1

Question 44

Which of the following descriptions about HBase. Secondary Index is correct

Options:

The secondary index associates the column to be searched with the rowkey into an index table

At this point, it is listed as a new rowkey; the original rowkey becomes the value

The secondary index is queried twice

all of the above

Question 45

Which of the following descriptions about the basic operations of Hive SQL is correct?

Options:

When loading data into Hive, the source data must be a path in HDFS

To create an external table, you must specify location information

Column delimiters can be specified when creating a table

Create an external table using the external keyword. To create a normal table, you need to specify the internal keyword

Question 46

Fusioninsight Manager's statement about the configuration function of the service is incorrect?

Options:

Service level configuration can take effect for all instances

Instance-level configuration takes effect only for this instance

Instance-level configuration also takes effect on other instances

After the configuration is saved, you need to restart the service to take effect

Question 47

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

Options:

persist

expire

ttl

expireat

Question 48

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

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

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

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

Question 49

Regarding the alarm about insufficient disk capacity of Kafkat, which of the following analysis is incorrect for the possible reasons?

Options:

The disk configuration used to store Kafka data (such as the number of disks, size, etC. ) cannot meet the current business data stream declaration, resulting in the disk usage reaching the upper limit

The data storage time is configured too long, and the accumulated data reaches the upper limit of the disk usage.

Unreasonable business planning results in uneven data distribution and makes some disks reach the upper limit of usage

Caused by the failure of the rocker node

Question 50

In order to ensure the reliability of snapshot storage of streaming applications, where are the snapshots mainly stored?

Options:

In the memory of the JobManager

In a single-machine database with high reliability

in the local file system

in HDFS

Question 51

When the number of nodes in the Zookeeper cluster is 5 nodes, how many nodes are the disaster recovery capabilities of the cluster equivalent to?

Options:

none of the above

Question 52

What is the index name of ElasticSearch?

Options:

ddcvc

doc

logstash-2020.01.17

3sDqsm8Bu-kTplzOjqhL

Question 53

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

Options:

HDFS Client

NodeManager

ResourceManager

ZooKeeper Failover Controller

Question 54

When installing the Streaming component of Fusioninsight HD, the Nimbus role requires several nodes to be installed

Options:

Question 55

Which of the following is not a state store supported by Flink( )?

Options:

FsStateBackend

RocksDBStateBackend

MemoryStateBackend

FileStateBackend

Question 56

Which of the supervisor descriptions of Fusioninsight HD Streaming is correct?

Options:

Supervisor is responsible for resource allocation and task scheduling

Supervisort is responsible for accepting tasks assigned by Nimbus, starting and stopping Worker processes that belong to its own management

Supervisor is a process that runs specific processing logic

Supervisor is a component that receives data in Topology and then performs processing

Question 57

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

Options:

uncertain

Question 58

Existing server.channelsa=ch1, set the Channel type to File Channel, which of the following configurations is correct?

Options:

server.channels.ch1.type file

server.channels.chl.type memory

server.channels.type memory

server.channels.type file

Question 59

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

Options:

Kafka strongly depends on Zookeeper

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

Kafkal server can generate messages

Consumer consumes messages as the client role of Kafkal

Question 60

Which module in Hadoop is responsible for data storage in HDFS?

Options:

NameNode

Data Node

ZooKeeper

JobTaoker

Question 61

To set the maximum resource usage of QueueA in YARN, which parameter needs to be configured?

Options:

yarn.scheduler.capacity.root.QueueA. user-limit-factor

yarn.scheduler.capacity.root.QueueA. minimum-user-limit-percent

yarn.scheduler.capacity.root.QueueA. state

yarn.scheduler.capacity.root.QueueA. maximum-capacity

Question 62

What is the core module of spark?

Options:

spark streaming

spark core

mapreduce

spark sql

Question 63

In order to improve the fault tolerance of Kafka, Kafka supports the replication strategy of partition. Which of the following descriptions about Leader partition and Follower partition is wrong?

Options:

It is impossible for each node of a kafka cluster to be l with each othereader and flower

If the leader fails, other followers will take over (become the new leader)

Because the leader server carries all the request pressure. Therefore, from the overall consideration of the cluster, kafka will distribute the leader evenly on each instance to ensure the overall performance is stable

Kafka needs to select a leader for partition replication, and the leader is responsible for reading and writing partitionsD. operation, other replica nodes are only responsible for data synchronization

Question 64

RowKey of a table in HBase:Divide the SplitKey into 9, e, a, z. How many Regions does this table have?

Options:

Question 65

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

Options:

output

input settings

convert

Basic Information

Question 66

In the Fusioninsight HD system, what is the LDAP data synchronization method?

Options:

One-way synchronization

two-way synchronization

Isolate out of sync

Data cross synchronization

Question 67

What services can Huawei MRS provide to customers?

Options:

Multi-node deployment

Statistical analysis and data mining

Security Control Based on Kerberosi Certificate

Offline and real-time data processing

Question 68

What are the main characteristics of big data analysis related technologies?

Options:

machine learning, full features

Event correlation analysis behind the data

Based on massive data

based on exact samples

Question 69

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

Options:

job status

Job start/run time

dirty data link

Error lines/number of files

Question 70

As shown in the figure, which of the following options are wide dependencies

Options:

group by A->B

map:C->D

union D&E->F

join B&F->G

Question 71

The following description about Flink barrier is wrong ( )

Options:

barrier) is periodically inserted into the data stream and flows with it as part of the data stream

Barriers are at the heart of Flink snapshots

A barrier compares the snapshot data of this cycle with the nextonePeriodic snapshot data is separated

When inserting barrierf, it will temporarily block the data flow

Question 72

SELECT a salary，b adiress FROM employee a JoiNsELECT adress FROM Employee info where provine ='zhejiang) b NO ananme=B. name: "What types of operations are included?

Options:

create table

Import Data

subquery

J0IN query

Question 73

In a Huawei Fusioninsight HD cluster, which of the following services can the Spark service read data from?

Options:

YARN

HDFS

Hive

HBase

Question 74

What items can FusionInsight Manager perform health checks on?

Options:

host

Serve

Role

example

Question 75

Which of the following measures are used to safeguard the integrity of data

Options:

Metadata Reliability Guarantee

Rebuild the replica data of the failed data disk

safe mode

Cluster data balance

Question 76

Multi-select Hive components can support multiple interfaces, which of the following interfaces is not supported

Options:

Beeline

ODBC

Restful

JDBC

Question 77

The following statements about the reliability of Fusioninsight network security are correct:

Options:

Avoid high load on the business plane from blocking the cluster management channel

Network plane isolation to avoid management and service bandwidth preemption and mutual interference

Prevent external attackers from infiltrating real business data through management channels

Fusioninsight supports dividing the network into three levels: the cluster service plane, the cluster management plane, and the maintenance network outside the cluster, which are physically isolated from each other.

Question 78

What are the correct understandings and descriptions of the main features of big data?

Options:

Many data sources and formats

Fast data growth and fast processing

Large amount of data, large amount of calculation

Low data value density, high value

Question 79

What information does a Key Value format in the HBase data file HFiler contain?

Options:

Key

Value

Timestamp

KeyType

Question 80

Provide enterprise-level metadata management under the DGC platform architecture. Data asset management can visually support drilling, traceability, etC. Through the data map, which module can provide data intelligent search and operation monitoring to realize the data blood relationship and data panorama visualization of data assets?

Options:

data development

Data Asset Management

Specification design

data integration

Question 81

Which of the following scenarios is Sparki suitable for?

Options:

graph computation

Interactive query

batch processing

real-time stream processing

Question 82

Are the following descriptions correct about the HBase file storage module (HBase FileStream, HFS for short)?

Options:

Applied in the upper layer of Fusioninsight HD

HFS encapsulates the interface between HBase and HDFS

Provide functions such as file storage, reading, and deletion for upper-layer applications

HFS is a separate module of HBase

Question 83

Which of the following scenarios is not suitable for HDFS?

A streaming data access

B. Lots of small file storage

C. Large file storage and access

D. random write

Options:

Question 84

HDFS of HadoopE is a distributed file system. Which of the following application scenarios is suitable for data storage and management?

Options:

Lots of small file storage

High capacity and high leaf swallowing capacity

low latency read

Streaming data access

Question 85

Which of the following designs are mainly considered in the planning process of the big data business consulting service plan?

Options:

Big data business model design

Panoramic planning of business scenarios

Typical Scenario Requirements Design

Scenario decomposition and business design

Question 86

The Fusionlnsight HD cluster contains many kinds of services, and each service consists of thousands of roles. Which of the following are the roles of the service?( )

Options:

HDFS

NameNode

DataNode

Hbase

Question 87

In big data computing tasks, about0Which description of intensive tasks is incorrect?oneitem?

Options:

Most of the time during I0-intensive task execution is spent at I0

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

High PU consumption

The more tasks, the more efficient the CPU

Question 88

In the process of using Flume to transmit data, in order to prevent data loss due to the restart of the Flume process. Which of the following Channel types can be used

Options:

Memory Channel

JDBC Channel

File Channel

HDES Channel

Question 89

Which of the following options does the time operation type supported by F1ink include?

Options:

End Time

processing time

Acquisition time

event time

Question 90

Which of the following statements about the LdapServer organizational model is correct?

Options:

Concrete objects cannot be defined under an organizational unit.

Each node in the LDAPServer directory tree is called an entry and has its own unique distinguished name DN (Distinguished Name).

The root of the LDAPServer directory tree generally defines the domain name DC (Domain Component).

DAPServer directory information is organized and stored based on a tree structure.

Question 91

In Huawei's big data solution, LadpServer, as a directory service system, can implement centralized management of accounts on the big data platform. The following statement about LdapServer is correct:

Options:

LdapServer supports TCP/P protocol.

LdapServer is a specific open source implementation based on the LDAP standard protocol.

LdapServerl uses Berkelay DB as the default backend database.

LdapServer is implemented based on OpenLDAP open source technology

Question 92

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

Options:

fink

hive

miner

spark

Question 93

When Fusionlnsight HD products deploy Kerberos and LDAP services, which of the following descriptions are correct?

Options:

Before deploying Kerberos services, LD must be deployedAP service

The LDAP service must be deployed on the same node as the Kerberos service

Deploying the same node for Kerberos service and LDAP service facilitates data access and improves performance

LDAP services can be shared by multiple clusters

Question 94

Regarding the task selection of the capacity scheduler, which of the following statements is true( )

Options:

Minimum queue level first

Resource recycling request queue priority

Maximum queue level first

The queue with the lowest resource utilization takes precedence

Question 95

The key features of Zookeeper include which of the following options?

Options:

atomicity

eventual consistency

wait for irrelevance

reliability

Question 96

There are 230 nodes in the FusionlnsightHD cluster of a university. Which of the following processes should be deployed on the data nodes during cluster planning?

ADataNode

B. NameNode

C. NodeManager

D. RegionServer

E.DBServer

F.SolrServer

Options:

Question 97

In Flink( )Interface for streaming data processing.( )interface for batch processing

Options:

Stream API, Batch API

Data Stream APl. DataSet AP

DataBatch AP1.DataStreamAPIi

BatchAP1, Stream APi

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HCIA-Big Data V3.0 Questions and Answers

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