H13-723-ENU Online Training Archives

Exam4Training HCNP-Big Data Developer experts have put their knowledge and experience together for designing the Huawei H13-723-ENU HCNP-Big Data-Developer(Huawei Certified Network Professional-Big Data Developer) Online Training. They have done a thorough study of the syllabus and exam procedure to bring the best of all resource in your hand. The Huawei H13-723-ENU ensures success in the first attempt that means you can pass your H13-723-ENU HCNP-Big Data-Developer(Huawei Certified Network Professional-Big Data Developer) without any doubt.

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1. In the implementation of the business logic of HBase writing data, which of the following interfaces or classes does not need to be involved?

Put

HTable

HBaseAdmin

PutList

2. In MapReduce application development, which of the following JAVA classes is responsible for managing and running a computing task?

lob

Context

FileSystem

Configuration

3. In FusionInsight HD, Oozie needs to upload the configuration files and jar packages that the job relies on to HDFS before submitting the job

True

False

4. In the Fusioninsight HD product, what is wrong about the Kafka secure and non-secure port description?

(Note: The old API refers to the old Producer API and the old Consumer API. Among them, the old Consumer API: refers to the interface defined in kafka.consumer.ConsumerConnector; the old Producer API: refers to the interface defined in kafka.producer.Producer.)

Kafka cluster security access port defaults to 21007, non-secure access port defaults to 21005.

The premise for the old API to access a topic through port 21005 is that the server parameter allow.everyone.if.no.acl.found is set to true, and the topic does not have ACL attributes set

The old API only supports access to port 21005; the new API is compatible with access to non-secure port 21005 and secure port 21007.

For topics with ACL set, you can use the old API to connect to port 21005 for access.

5. Which of the following methods can generate DStream objects?

KafkaUtils.createStream(...)

KafkaUtils.createDirectStream(...)

StreamingContext.socketStream(..)

StreamingContext.fileStream(...)

6. Regarding the file format provided by Hive in the FusionInsight HD system, which is not a columnar file?

CRC

Parquet

RCFile

TextFiIe

7. In FusionInsight HD, for the creation and read-write permissions of various resources in Solr, which of the following statements is wrong?

Solr user group users can create a configuration set and specify the configuration set when creating a Collection

Users of the Solr user group can create Collection

Collection creator, role with read and write access to the collection, and Solr admin role can update the collection

Only the collection creator and Solr admin roles can delete a collection

8. In Spark, which of the following is the operator that takes the intersection of the DataFrame?

filter (condifionExpr: String): DataFrame

join (right: DataFrame, join Exprs: Column): DataFrame

intersect (other: Data Fra me): Data Fra me

dropDuplicates():DataFrame

9. To create a table through HBase's createTable method, what parameters must be passed in?

Table name

Table names and columns

Table name and column family

Can be empty

10. The system time of the node where the HDFS client is located must be consistent with the system time of the FusionInsight HD cluster. If there is a time difference, the time difference should be less than a few minutes?

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11. In the process of Flume cascade transmission, you can use the fail over mode to transmit, so that if the Flume node of the next hop fails or the data is received abnormally, it can automatically switch to another way to continue transmission.

True

False

12. In FusionInsight HD, what are the roles that belong to the Streaming service? (multiple choice)

Nimbus

Supervisor

Broker

quorumpeer

13. Regarding Streaming's topology, what is wrong in the following description?

A Topology is a directed acyclic graph (DAG) connected by a set of Spout components and Bolt components through Stream Groupings

Topology will keep running until it is explicitly killed

Business logic is encapsulated in Topology

A Topology can only specify to start one Worker process

14. When the HDFS client writes files to HDFS with N copies, if one of the copies fails to write, all copies will return the write failure.

True

False

15. In FusionInsight HD, use the Streaming command line to submit the om.huawei.examole.WordCount task in example.jar. The task name is wcTest. Which of the following commands is correct?

storm jar example .jar wcTest om.huawei.example.WordCount

storm jar example .jar wcTest WordCount

storm jar example .jar om.huawei.example.WordCount wcTest

storm jar example.jar WordCount wcTest

16. For an application running on the MapReduce platform, where will the jar package that the application depends on be placed?

HIVE

HBASE

HDFS

17. As the core object of Spark, which of the following characteristics does RDD have? (multiple choice)

Read only

Partition

Fault tolerance

Efficient

18. In FusionInsight HD, what are the computing frameworks that can be used in real-time processing scenarios? (multiple choice)

Spark Streaming

Streaming

MapReduoe

HDFS

19. In FusionInsight HD, which method of the OozieClient class will be called by the JAVA API of the Oozie client when running tasks?

suspend

getJobInfo

submit

run

20. Set the data block storage size to 128M. When the HDFS client writes a file, when writing a 100M file, how much storage space is actually occupied?

128M

100M

64M

50M

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21. Which of the following reasons will cause HDFS NameNode to enter safemode (safe read-only mode)? (multiple choice)

The disk space where the metadata of the active and standby NameNodes reside is insufficient.

The number of lost blocks exceeds the threshold.

The missing copy exceeds the threshold.

The damaged copy exceeds the threshold.

22. For the HBase component of the FusionInsight HD platform, what attributes of the secondary index need to be defined when adding a secondary index? (multiple choice)

Index name

Index column

Index column type

The name of the column family to which the index column belongs

23. When a MapReduce application is executed, which of the following actions occurred before the map phase?

split

combine

partition

sort

24. In FusionInsight HD, regarding the secondary development of Hive UDF, which of the following descriptions is correct? (multiple choice)

Before the user-defined UDF is used, it needs to be created in the Hive system.

User-defined UDF is not allowed to add information such as summary and status.

User-defined UDF can add deterministic and statefull annotations according to the actual situation.

In a secure cluster, user-defined UDFs are recommended to be created before each use.

25. In the FusionInsight HD product, what is the role name of the Kafka service?

Producer

Broker

Consumer

ZooKeeper

26. What are the several parameter setting methods for Spark applications? (multiple choices)

Configure in the application configuration file spark-defaults.conf

When submitting the application, set it through --conf

In the application code, set by the setProperty method of SparkContext

In the application code, set through the SparkConf object

27. In a FusionInsight HD cluster, Flume does not support writing collected data to which service in the cluster?

HDFS

HBase

Kafka

Redis

28. In Spark, assuming that lines is a DStream object, which of the following statements can periodically count the number of words on this stream?

Iines.flatMap(_.split ” “” )).map(word => (word, 1)).reduce(_ +_).print()

Iines.flatMap(_.split ” “” )).map(word => (word,word.Iength())).reduceByKey (_ +_).print()

Iines.fIatMap(_.spIit ” “” )).map(word => (word, 1)).reduceByKey(_ +_).print()

Iines.flatMap(_.split ” “” )).flatMap(word => (word, 1)).groupByKey(_ +_).print()

29. HBase filters can set column names or column values as filter conditions, and support multiple filters to be used together.

True

False

30. Regarding the disaster tolerance of Streaming, which of the following statements is correct? (multiple choice)

After the Supervisor process exits, it can be automatically recognized and pulled up by Nimbus without affecting the running business.

Worker can be automatically pulled up by Supervisor after abnormal exit without manual intervention.

When a node fails, tasks on that node will be reassigned to other normal nodes without manual intervention.

After Nimbus fails, the standby Nimbus will automatically take over, without affecting the running business.

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31. The rowkey design of HBase table is a very important development and design link.

Suppose there are the following scenarios. The most frequent query scenario is based on the mobile phone number to query the historical call records every month and every six months. Which of the following rowkey designs is the best?

Name + mobile phone number

Date + mobile phone number

Mobile number + date

Mobile phone number + name

32. When indexing in Solr, which of the following code snippets can significantly improve indexing performance? (multiple choice)

lbClient.setRequestWriter (new BinaryRequestWriter());

if (updateRequest.getDocumentsMap().size() >= 10000) { cloudSolrClient.request (updateRequest, collName); updateRequest.clear(); }

if (updateRequest.getDocuments().size() >= 1000) { cloudSolrClient.request (updateRequest, collName); updateRequest.clear(); }

SolrlnputDocument doc = new SolrlnputDocument(); doc.addField ("id", i.toString()); doc.addField ("name", "Zhang San" + i); doc.addField ("features", "test" + ); doc.addField ("price", (float) i * 1.01); cloudSolrClient.add (doc); cloudSolrClient.commit();

33. In FusionInsigt HD, which of the following components can be used for data collection? (multiple choice)

Flume

Loader

HBase

MapReduoe

34. When using Solr for full-text search, you can specify the response format of the query result through the wt parameter.

Regarding the response format of Solr query results, what is wrong in the following statement?

Support CSV and JSON

Support CSV, JSON and HTML

Support CSV, JSON and XML

35. During the Solr application development of FusionInsight HD products, you can verify the Collection through the Solr Admin UI.

Which of the following statements about Solr Admin UI is correct? (multiple choice)

Click Tree under Cloud to view metadata information such as Collections, configuration sets and live_nodes in Solr Cloud

Click Cloud to view the distribution and status of each ShardReplica under each Collection

Enter the Core Overview interface of the Shard Replica of a Collection, you can view the actual number of documents, storage size and location information of the Replica index

Solr user group, Solr admin role and Super group users can access Solr Admin UI

36. A certain project needs to save the online data in a certain area and search the full text whether there is any sensitive information in these online records to prevent crimes in the area.

In this scenario, which of the following is the best solution?

Create an index on Solr, save the data, and return all the data when searching the full text.

Store data on HBase, and satisfy fuzzy matching queries through HBase's filtering features.

When storing data, create an index on Solr and store the complete data in HBasx; when querying, obtain key information of records through Solr full-text search, and obtain complete records on HBase through key information.

37. In FusionInsight HD's Hive, the user-defined UDF can have the same name as the Hive built-in UDF. In this case, the user-defined UDF will be used.

True

False

38. Suppose there is an application, there are 10 tables, each table has tens of millions of records, and the number of fields is about 20.

Now Redis is used to cache the data of these 10 tables. For the design of the data structure, which of the following is the best design?

A hash structure is adopted, and a table uses a hash KEY, and a row in the table records a field for the hash KE

Using a hash structure, each row record of each table uses a hash KEY, the field of the hash KEY corresponds to the field of the table record, and each table is designed with a different prefix to distinguish it.

Using string structure, each field in each row of each table uses a KE

Using string structure, each row of each table uses a KEY, and value is the concatenated value of all the fields in a row of the table.

39. In the Hive application of FusionInsight HD, there are scenarios where the data storage file has a high compression efficiency, and most queries only involve a part of the file field. This scenario is suitable for ORC File storage.

True

False

40. In FusionInsight HD, which of the following source types does Flume support? (multiple choice)

Avro

HBase

Kafka

HTTP