EMT Practice Test

1. Question Content...

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Question1: When writing MapReduce applications, which two interfaces usually need developers to implement?

Question2: 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?

Question3: What are the several parameter setting methods for Spark applications? (multiple choices)

Question4: HDFS is not suitable for which of the following business scenarios?

Question5: In FusionInsight HD V100R002C60, regarding the Hive Python interface type, which of the following descriptions is incorrect?

Question6: Which of the following business applications is not suitable for Hive?

Question7: When adding a RegionServer host to an HBase cluster, you must stop the original cluster first, because HBase does not support dynamic expansion.

Question8: 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)

Question9: In Flume, what is the main function of the source function module?

Question10: When the cluster is normal, the Redis client initiates a get call, and there are () message interactions between the client and the server?

Question11: In a FusionInsight HD cluster, Flume does not support writing collected data to which service in the cluster?

Question12: In Streaming application development, which interface does Bolt use to send Tuples?

Question13: Spark Streaming can receive data from Kafka and perform calculations. The calculation results can only be stored in HDFS and cannot be written back to Kafka.

Question14: 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.

Question15: In Spark, assuming that lines is a DStream object, which of the following statements can periodically count the number of words on this stream?

Question16: In FusionInsight HD, what are the computing frameworks that can be used in real-time processing scenarios? (multiple choice)

Question17: When designing a certain collection of Solr, you need to design its Schema, and realize the design of the Schema by configuring the schema.xml file. What is wrong about the Schema statement below?

Question18: In FusionInsight HD, if there are multiple sources in a Flume configuration file, the source names cannot be repeated.

Question19: In FusionInsight HD, regarding Ooze job management, which of the following operations can be performed on suspended jobs? (multiple choice)

Question20: In FusionInsight HD, Oozie supports HDFS Action.

Question21: In FusionInsight HD, which parts of a complete Streaming CQL application include at least? (multiple choice)

Question22: In the Solr application query scenario, when the query results are paged in depth, the cursor needs to be used to page in depth. Which of the following is correct about the cursor? (multiple choice)

Question23: Regarding the characteristics of Redis, which of the following descriptions is correct? (multiple choice)

Question24: In the online log query solution, stream processing is used to complete the calculation. During the entire calculation process, intermediate calculation results need to be temporarily stored. Which of the following components is suitable for storing intermediate calculation results? (multiple choice)

Question25: Which Redis commands are atomic operations?

Question26: Suppose there is an application that needs to frequently access the user table in the Oracle database. In order to improve performance, Redis is introduced to cache user information.
For this scenario, which of the following is the best data structure choice for Redis?

Question27: Which of the following table types does Hive support? (multiple choice)

Question28: In the HBase table design, for multiple businesses sharing the rowkey, which leads to data access contradictions, what strategies can be used to deal with it?

Question29: Regarding the Hive service of the FusionInsight HD platform and its WebHCat development interface, which of the following descriptions is incorrect?

Question30: To create a table through HBase's createTable method, what parameters must be passed in?

Question31: In the implementation of the business logic of HBase writing data, which of the following interfaces or classes does not need to be involved?

Question32: Which of the following is not a feature of MapReduce?

Question33: In FusionInsigt HD, which of the following components can be used for data collection? (multiple choice)

Question34: In the FusionInsight HD product, what is the role name of the Kafka service?

Question35: 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.

Question36: 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?

Question37: In Kafka, Consumer can support both offline and online message consumption, but the consumption of data is sequential consumption.

Question38: As the core object of Spark, which of the following characteristics does RDD have? (multiple choice)

Question39: In FusionInsight HD, assuming a topology, spout concurrency is set to 3, bolt1 concurrency is 2, bolt2 concurrency is 3, and the number of workers is 2, then how are bolt1's executors distributed among workers?

Question40: In HDFS application development, which of the following are the interfaces supported by the HDFS service? (multiple choice)

Question41: In FusionInsight HD, which of the following source types does Flume support? (multiple choice)

Question42: In FusionInsight HD, which of the following are the configuration items of Oozie's MapReduce Action? (multiple choice)

Question43: 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.

Question44: In the FusionInsight HD cluster, regarding the kinit operation command, which of the following statements are wrong? (multiple choice)

Question45: Which of the following methods can generate DStream objects?

Question46: In Spark, assuming that lines is a DStream object, the filter statement can filter out 80% of the data. Which statement is correct for the following two statements:
X: lines.filter(...).groupByKey(...)
Y: lines.groupByKey(...).filter(...)

Question47: For an application running on the MapReduce platform, where will the jar package that the application depends on be placed?

Question48: In the FusionInsight HD system, in the Solr example project solr-example\conf\solr-example.properties, the values of ZK_URL and ZOOKEEPER_DEFAULT_SERVER_PRINCIPAL can be obtained from which of the following options?

Question49: Regarding the flow of data in Flume, which of the following descriptions is correct?

Question50: In FusionInsight HD, which method of the OozieClient class will be called by the JAVA API of the Oozie client when running tasks?

Question51: In Spark, the accumulator can realize high-speed parallel counter and variable summation; in the process of Spark application development, only the value of this counter can be obtained on the Driver.

Question52: When a MapReduce application is executed, which of the following actions occurred before the map phase?

Question53: 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)

Question54: In FusionInsight HD, for the creation and read-write permissions of various resources in Solr, which of the following statements is wrong?