Pass H13-723 Exam - Real Test Engine PDF with 155 Questions
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NEW QUESTION 42
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?
- A. Support CSV, JSON and HTML
- B. Support CSV and JSON
- C. Support CSV, JSON and XML
Answer: A
NEW QUESTION 43
In Kafka, which of the following commands can check how many partitions a topic has?
- A. kafka-topics.sh --create
- B. kafka-topics.sh --list
- C. kafka-topics.sh --alter
- D. kafka-topics.sh - describe
Answer: D
NEW QUESTION 44
For files stored in N (N>1) copies, the HDFS client initiates a file read request. If the read copy node fails, it will directly return to failure and will not go to other copy nodes for reading.
- A. False
- B. True
Answer: A
NEW QUESTION 45
Which of the following scenarios is not suitable for Redis? (multiple choice)
- A. A message queue application that is consumed by multiple consumers at the same time and guarantees that the message is successfully consumed by all subscribers (subscription-notification)
- B. Counter application: for example, counting the number of people logged in to a certain website
- C. Get the latest N data: for example, get the latest 10 comments on a Weibo
- D. Complex transaction operations
Answer: A,D
NEW QUESTION 46
There are the following business scenarios: the user's online log files have been stored on HDFS, and the log file content format is: each online record has three fields, namely name, gender, and online time, separated by "," between the fields; All female netizens who spend more than two hours online are required to print out.
Which of the following code fragments can achieve the above business scenarios? (multiple choice)
- A. sc.textFile( " /data/file/path " .map(_.split( " , " ).map(p => Femalelnfo(p(0), p(1), p (2) .trim.tolnt)).toDF.registerTempTable("FemalelnfoTable") sqlContext.sql("select name,sum(stayTime) as stayTime from FemalelnfoTable where gender = ' Female ' group by name " ).filter( " stayTime >= 120 " ).collect().foreach(println)
- B. val text = sc.textFile("/data/file/path") val data = text.filter(_.contains("female")) val femaleData:RDD[(String,Int)] = data.map{Iine => val t = line.split( ' , ' ) (t(0),t(2).tolnt) }.reduceByKey(_ + _) val result = femaleData.filter(line => line._2> 120) result.collect().map(x => x._1 + ' , ' + x._2).foreach(println)
- C. val text = sc.textFile("/data/file/path") val data = text.filter(_.contains("female")) val femaleData:RDD[(String,Int)] = data.map{Iine => val t = line.split( ' , ' ) (t(0),t(2).tolnt) }. val result = femaleData.filter(line => line._2> 120) result.collect().map(x => x._1 + ' , ' + x._2).foreach(println)
- D. sc.textFile( " /data/file/path " .map(_.split( " , " ).map(p => Femalelnfo(p(0), p(1), p (2) .trim.tolnt)).toDF.registerTempTable("FemalelnfoTable") sqlContext.sql("select name,sum(stayTime) as stayTime from FemalelnfoTable where gender = ' Female '" ).filter( " stayTime >= 120 " ).collect().foreach(println)
Answer: A,B
NEW QUESTION 47
In FusionInsight HD, Spark uses YARN as the cluster resource management system by default.
- A. True
- B. False
Answer: A
NEW QUESTION 48
In FusionInsight HD, when using Streaming's Linux command line mode to submit a topology, a user with Streaming submission permission needs to be used for kinit authentication
- A. True
- B. False
Answer: A
NEW QUESTION 49
When developing applications in the FusionInsight HD security version, the keytab file can be used for Kerberos security authentication.
- A. True
- B. False
Answer: A
NEW QUESTION 50
What are the features of Streaming in FusionInsight HD? (multiple choice)
- A. Scalable
- B. High performance
- C. Stream processing
- D. High fault tolerance
Answer: A,B,C,D
NEW QUESTION 51
In Spark application development, which of the following codes can correctly count words?
- A. val counts = textFile.map (line => line.split ("')).map (-rd => (word, 1)).reduceByKey(_ +_)
- B. val counts = textFile.map (line=>line.split (" ")).map (word => (word, 1)).groupByKey ()
- C. val counts = textFile.flatMap (line=>line.split (" ")).map (word => (word, 1)).groupByKey ()
- D. val counts = textFile.flatMap (line=>line.split (" ")).map (word => (word, 1)).reduceByKey(_ +_)
Answer: D
NEW QUESTION 52
Hive service and HBase service are deployed on a FusionInsight cluster, and two apps (applications) are deployed on Tomcat. One app is to access the HBase service, and the other app is to access the Hive service. Regarding authentication, which methods are as follows Is it right? (multiple choice)
- A. Combine these two apps into one and do authentication on the new app
- B. Just do authentication on the app that accesses the Hive service.
- C. Just do authentication on the app that accesses the HBase service
- D. Deploy these two apps to two independent Tomcats, and then authenticate each
Answer: A,D
NEW QUESTION 53
For Spark Streaming applications, in a JVM, only one StreamingContext can be active at the same time.
- A. True
- B. False
Answer: A
NEW QUESTION 54
Solr is a high-performance, full-text search service based on Lucene. Solr has extended Lucene to provide a richer query language than Lucene, and implements a powerful full-text search function with a high degree of scalability. At the same time, starting from Solr 4.0 version, SolrCloud mode is supported.
- A. True
- B. False
Answer: A
NEW QUESTION 55
HDFS adopts a file access model of "write once, read many times". Therefore, it is recommended that after a file is created, written, and closed, it should not be modified.
- A. True
- B. False
Answer: A
NEW QUESTION 56
In FusionInsight HD, regarding the partition function of Hive, what is wrong in the following description?
- A. The partition field can be used as the condition of the where clause
- B. Using partitions can reduce the data scan range of certain queries, thereby improving query efficiency
- C. There can only be one partition field, and multi-level partitions cannot be created
- D. The partition field should be defined when the table is created
Answer: C
NEW QUESTION 57
In FusionInsigt HD, which of the following components can be used for data collection? (multiple choice)
- A. Flume
- B. MapReduoe
- C. Loader
- D. HBase
Answer: A,C
NEW QUESTION 58
In FusionInsigt HD, if an application wants to complete Kerberos security authentication, which of the following options must be used? (multiple choice)
- A. jaas.conf configuration file
- B. User account applied for on FusionInsight Manager
- C. The keytab file of the user account
- D. krb5.conf configuration file
Answer: B,C,D
NEW QUESTION 59
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.
- A. False
- B. True
Answer: A
NEW QUESTION 60
In FusionInsight HD, which method of the OozieClient class will be called by the JAVA API of the Oozie client when running tasks?
- A. getJobInfo
- B. suspend
- C. submit
- D. run
Answer: D
NEW QUESTION 61
Document is the main entity stored in the SolrColud cluster. It is the basic unit of indexing and query. It can contain one or more fields and is a set of data describing certain things. Each document must contain a uniqueKey field that can uniquely identify the document.
- A. True
- B. False
Answer: A
NEW QUESTION 62
In FusionInsight HD, regarding Hive's data loading function (importing data through Hive's LOAD command), what is wrong in the following description?
- A. Hive's data loading process will not parse the specific file content, mainly the process of file transfer
- B. It can be directly loaded to the hive table from the local hard disk of the node where HiveServer is located
- C. It can be loaded directly to the hive table from HDFS
- D. It can be directly loaded to the hive table from the local hard disk of the node where the client is located
Answer: D
NEW QUESTION 63
Regarding Streaming's topology, what is wrong in the following description?
- A. A Topology is a directed acyclic graph (DAG) connected by a set of Spout components and Bolt components through Stream Groupings
- B. Business logic is encapsulated in Topology
- C. A Topology can only specify to start one Worker process
- D. Topology will keep running until it is explicitly killed
Answer: C
NEW QUESTION 64
Regarding the characteristics of Redis, which of the following descriptions is correct? (multiple choice)
- A. Support data persistence
- B. Low latency
- C. Support SQL query interface
- D. Rich data structure
Answer: A,B,D
NEW QUESTION 65
Regarding Redis cluster topology information, which of the following descriptions is correct?
- A. Neither
- B. Both
- C. The client caches the cluster topology information
- D. The server caches the cluster topology information
Answer: B
NEW QUESTION 66
In the V100R002C60 version of the FusionInsight HD system, Hive only supports query services based on the MapReduce engine, and does not support query services based on the Spark engine.
- A. False
- B. True
Answer: A
NEW QUESTION 67
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