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NEW QUESTION 18
In Kafka, which statement about Consumer is correct? (multiple choice)
- A. Topic needs to be specified when Consumer consumes data
- B. Consumer mainly conducts data consumption
- C. The new ConsumerAPI consumption data does not need to specify the ZooKeeper address
- D. When multiple Consumers are configured with the same group.id, the data consumed by these Consumers will not be repeated
Answer: A,B,C,D
NEW QUESTION 19
In FusionInsigt HD, the user wants to query the contents of a certain HBase table through the HBase shell operation. In this scenario, it is recommended that the administrator assign a machine-to-machine account to the user.
- A. False
- B. True
Answer: A
NEW QUESTION 20
When adding a RegionServer host to an HBase cluster, you must stop the original cluster first, because HBase does not support dynamic expansion.
- A. False
- B. True
Answer: A
NEW QUESTION 21
An application needs to interact with two FusionInsight clusters at the same time: it needs to access both the HBase service of cluster 1 and the Hive service of cluster 2;
So which of the following operations are necessary? (multiple choice)
- A. The accounts created by option A and option B must belong to the supergroup group
- B. Create an account with the same name in option A on cluster 2, and set this account to access the Hive service of this cluster
- C. Create the account required for this application on cluster 1, and set this account to access the HBase service of the cluster
- D. Cluster 1 and cluster 2 complete mutual trust operation
Answer: B,C,D
NEW QUESTION 22
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.
- A. False
- B. True
Answer: A
NEW QUESTION 23
The calculation logic of the Spark application will be parsed into DNG. Which of the following functional modules will complete this parsing operation?
- A. Client
- B. Application Master
- C. Executor
- D. Driver
Answer: D
NEW QUESTION 24
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 25
In Spark, SparkSQL is an independent module, which can independently complete SQL statement parsing, optimization, and execution without relying on SparkCore.
- A. False
- B. True
Answer: A
NEW QUESTION 26
When the cluster is normal, the Redis client initiates a get call, and there are () message interactions between the client and the server?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION 27
For the design principles of HBase rowkey, which of the following descriptions is correct? (multiple choice)
- A. The attribute value with high access weight is placed in the second half of Rowkey
- B. The attribute value with good dispersion is placed in the first half of Rowkey
- C. The attribute value with high access weight is placed in front of RowKey
- D. Attribute values with good dispersion are placed in the second half of Rowkey
Answer: B,C
NEW QUESTION 28
Which of the following reasons will cause HDFS NameNode to enter safemode (safe read-only mode)? (multiple choice)
- A. The damaged copy exceeds the threshold.
- B. The number of lost blocks exceeds the threshold.
- C. The missing copy exceeds the threshold.
- D. The disk space where the metadata of the active and standby NameNodes reside is insufficient.
Answer: B,D
NEW QUESTION 29
HDFS is not suitable for which of the following business scenarios?
- A. Large amount of small file storage
- B. Large file storage
- C. Mass data storage
- D. Streaming file storage
Answer: A
NEW QUESTION 30
In FusionInsight HD, Oozie needs to upload the configuration files and jar packages that the job relies on to HDFS before submitting the job
- A. True
- B. False
Answer: A
NEW QUESTION 31
In the implementation of the business logic of HBase writing data, which of the following interfaces or classes does not need to be involved?
- A. HTable
- B. Put
- C. HBaseAdmin
- D. PutList
Answer: C
NEW QUESTION 32
In FusionInsight HD, regarding the secondary development of Hive UDF, which of the following descriptions is correct? (multiple choice)
- A. User-defined UDF is not allowed to add information such as summary and status.
- B. User-defined UDF can add deterministic and statefull annotations according to the actual situation.
- C. Before the user-defined UDF is used, it needs to be created in the Hive system.
- D. In a secure cluster, user-defined UDFs are recommended to be created before each use.
Answer: B,C
NEW QUESTION 33
Regarding the characteristics of the data collected by Flume, which of the following descriptions is correct?
- A. Use external timing tasks to trigger data collection
- B. Parallel collection with MapReduce tasks
- C. Support distributed and streaming collection
- D. Only structured data can be collected
Answer: C
NEW QUESTION 34
Regarding Streaming's topology, what is wrong in the following description?
- A. A Topology can only specify to start one Worker process
- B. Business logic is encapsulated in Topology
- C. Topology will keep running until it is explicitly killed
- D. A Topology is a directed acyclic graph (DAG) connected by a set of Spout components and Bolt components through Stream Groupings
Answer: A
NEW QUESTION 35
In Spark, assuming that lines is a DStream object, which of the following statements can periodically count the number of words on this stream?
- A. Iines.flatMap(_.split (" " )).map(word => (word, 1)).reduce(_ +_).print()
- B. Iines.fIatMap(_.spIit (" " )).map(word => (word, 1)).reduceByKey(_ +_).print()
- C. Iines.flatMap(_.split (" " )).map(word => (word,word.Iength())).reduceByKey (_ +_).print()
- D. Iines.flatMap(_.split (" " )).flatMap(word => (word, 1)).groupByKey(_ +_).print()
Answer: B
NEW QUESTION 36
In the FusionInsight HD cluster, regarding the kinit operation command, which of the following statements are wrong? (multiple choice)
- A. A client does not support simultaneous use of multiple accounts.
- B. Only machine-to-machine accounts can be used.
- C. The ticket obtained by executing this command will time out after 24 hours. You need to execute the kinit command again to log in again.
- D. Only human-machine accounts can be used.
Answer: A,B,D
NEW QUESTION 37
Which of the following measures can improve the query performance of HBase? (multiple choice)
- A. Query frequent attributes are placed in front of rowkey
- B. Pre-divide regions to make regions evenly distributed and improve concurrency
- C. The data read at the same time are stored in the same cell
- D. Use secondary indexes to adapt to more query scenarios
Answer: A,B,C,D
NEW QUESTION 38
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. 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)
- 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) }.reduceByKey(_ + _) val result = femaleData.filter(line => line._2> 120) result.collect().map(x => x._1 + ' , ' + x._2).foreach(println)
- D. 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)
Answer: A,C
NEW QUESTION 39
In FusionInsight HD, regarding Oozie's job operation commands, which of the following descriptions are correct? (multiple choice)
- A. The start command can make the job in the PREP state become RUNNING
- B. The run command can make the job status RUNNING
- C. The kill command can be used on jobs in PREP/SUSPEND/RUNNING status
- D. The submit command can change the status of the job to PREP
Answer: A,B,C,D
NEW QUESTION 40
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