EMT Practice Test

1. Question Content...

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Question1: What modules does the Spark framework include?

Question2: In the numberaccording toDuring stream processing, eachthingThe time can be divided into which of the following three?

Question3: The high reliability of Fusioninsight HD data is reflected in which of the following aspects?

Question4: Which of the following components does the platform architecture of Huawei's big data solution include?

Question5: The following descriptions about FusionInsight multi-tenant management are correct

Question6: The description of HBase's Region Split splitting process is incorrect( )

Question7: FlinkWhich of the following three types of windows can be divided into the following three types of windows according to different implementation principles?

Question8: If using Redis pairAn ordered collection is sorted, which data type?

Question9: Which of the following extensions belong to ElasticSearch?

Question10: In Hive, which of the following descriptions about bucketing is correct?

Question11: Which of the following functions can the kafka-clustermirroring tool implement?

Question12: What can the unified certification management system of the new mainstream merchants consist of?

Question13: Which of the following options is a key feature of the HDFS architecture?

Question14: What types of data sources does F1ink stream processing include?

Question15: F1ink state preservation mainly depends on( )mechanism, which regularly backs up the state in the program.

Question16: HBasetable design, column families andRowKeyIt is an important part of table design. Which of the following options is not suitableDoRowKey?

Question17: Which of the following components must depend on Zookeeper to run?

Question18: Big data requires the transformation of traditional industry thinking. Data collection and analysis should be regarded as an important part of business processes. The data end drives business process optimization, realizes intelligence and automation, and relies on data assets to achieve cross-border expansion

Question19: In the task scheduling process of YARN, which of the following is the task that the ApplicationMaster is responsible for?

Question20: The size of the memory allocated by YARN to Containerb in the Hadoop system, which can be set by the parameter yarn.app.mapreduceam.resource.mb

Question21: Which of the following are the optimization methods of Redis?

Question22: The key features of Zookeeper include which of the following options?

Question23: Which of the following options cannot be achieved through big data technology?

Question24: What steps are included in the preparation for Fusioninsight HD installation?

Question25: Which of the following parts does the structure of the unified certification management system include?

Question26: Fusioninsight Spark SQL, like the community Spark JDBCServer, only supports single-tenant binding to a YARN resource queue and multi-tenancy, and does not support multi-tenant parallel execution.

Question27: The figure below shows the configuration of HDFS tiered storage. If the number of copies of a block is 4. Which of the following statements is wrong?

Question28: HDFS of HadoopE is a distributed file system. Which of the following application scenarios is suitable for data storage and management?

Question29: Which of the following application scenarios can HBase be used for? (multiple choice)

Question30: carriage return as its row separator. In Huawei Fusioninsight Hiver, you can specify the input and output format processing classes of table data.

Question31: In MapReduce programming, code not only describes what to do, but also how to do it.

Question32: The flume architecture shown in the figure below is mainly used to import data from outside the cluster into the cluster.

Question33: The data node is the working node of HDFS. Which of the following are its functions? (multiple choice)

Question34: Fl?Me is akind of distributed. highreliable and highavailableofClothesservice. useto be effectivecompare?,polymerization?Move a lot of logs? ?.

Question35: Which of the following are enterprise-level big data application scenarios

Question36: BloomFilter of HBase is used to filter data.

Question37: Which of the following options is an important role for Spark

Question38: Regarding the basic operation of Hive table building, the correct description is

Question39: As an authentication server center, Kerberos1 can provide unified authentication services to all services in the cluster and secondary development applications of customers.

Question40: The following description about the flink window is wrong

Question41: When HBasel is deployed in a Fusioninsight HD cluster with N nodes, it is recommended to deploy( )HMasteri process,( )A RegionServeri process.

Question42: Which of the descriptions of ordinary tables and external tables in Hive is incorrect?

Question43: Which of the following is not included in the schemai authentication method of Zookeeper?

Question44: Which of the following options does the main role of Zookeeper in distributed applications not include?

Question45: HiveThe operation process includes the following steps, please select the correct oneorder
1:HiveAccording to table classtypeUpdate HDFS or Hivedata in warehouse.
2:Client submits HQL command
3:YARNAllocate resources to applications in the cluster,andfor YARNH in the queueiveThe job enables authorization.
4: Tezexecute query
5:Hive via JDBCevencatchreturncheckquery result.

Question46: About HDFSThe function of the NameNode, which one of the following descriptions is wrong?

Question47: Hiveis establishedHadccpdata warehouse basefoundationframework. itcarryProvides a range of tools that can be used to performaccording to?Extractive loading?,Thisis a possiblestorage,? ?Analysis is stored inH?The mechanism of large numbers in.

Question48: The HDFS data reading process includes the following steps, please choose the correct order. (Drag picture title, sort question)

Question49: Which of the following descriptions about Zookeeper features is wrong?

Question50: Hive does not retrieve whether the data conforms to the schema during load. Hive follows the schema on read (the read mode only checks the Hive data field schema when the read mode is in the mode.

Question51: Which of the following options describes the Compaction correctly?

Question52: Which of the following descriptions about the functions of HMaster in HBase are correct?

Question53: Which of the following options are action operators?

Question54: The smallest processing unit of HBase is Region, and the routing information between User Region and RegionServer is stored in Zookeeper.

Question55: Hive does not check whether the data conforms to the schema during load. Hive follows the schema on read (read mode. Only when reading is Hive checks and parses specific data fields and schemas.

Question56: In order to consider performance optimization, it is recommended to deploy LdapServer and KrbServer on the same node in all clusters.

Question57: When installing the Streaming component of Fusioninsight HD, the Nimbus role requires several nodes to be installed

Question58: When a certain task of MapReduce fails, the task can be recalculated through the retry mechanism.

Question59: Is the description of the role of the standby NameNode correct in the HDFS system?

Question60: a big data? ?Real-time users in processing statistics?data, the following?No?within a minute?data is grouped?What is the function of

Question61: If the physical memory utilization of some Containers exceeds the configured memory threshold, but the total memory utilization of all Containers does not exceed the set NodeManager1 memory threshold, then the Containert with excessive memory usage can still continue to run.

Question62: During the deployment of FusioninsightHD , the CheckNode. Config configuration file must be called when performing precheck to check each node.

Question63: Which of the following options is correct for the description of Compactiong?

Question64: HBase quickly determines that user data does not exist. (fill in the blank)

Question65: Watermark is a mechanism proposed by Apache Flink to process EventTime window calculation, which is essentially a timestamp.

Question66: In the Fusionlnsight HD product, a typical Kafka cluster contains several Producers, several Borkers, several Consumers and a Zookeeper cluster

Question67: Flumofor data collection. What is the basic unit of data it transmits?

Question68: Which of the following is not a role or service involved in the process of reading data in HBasei?

Question69: Which of the following descriptions about Hive features is incorrect?

Question70: YARN manages cluster resources through ResourceManager. What are its main functions?

Question71: Which of the following is not a characteristic of the MapReduce component in Hadoopl?

Question72: What log download methods does Fusionlnsight HD support?

Question73: What are the main characteristics of big data analysis related technologies?

Question74: When creating a Loader job, in which of the following steps can the number of Maps be set?

Question75: The following figure shows the label storage strategy of HDFS. Observe the figure below, which data nodes will HBasel data be stored on

Question76: MapReduceprocess, by default,oneEach shard is a block, andYesOneMap Tasks.

Question77: In the Fusioninsight HD system, HBase supports dynamic expansion of columns.

Question78: In big data computing tasks, about0Which description of intensive tasks is incorrect?oneitem?

Question79: The order in which the YARN scheduler allocates resources, which one of the following descriptions is correct?

Question80: Sparki - like Hadoop - is not suitable for iterative computing.

Question81: Which of the following options are Huawei's data center solutions?

Question82: Which of the following contents can be viewed in the Loader historical job record?

Question83: What interfaces does Fusioninsight Manager support when interfacing with external platforms?

Question84: By configuring which of the following parameters can the logs generated in Kafkal be cleaned up?

Question85: Which of the following destinations can Fusioninsight HD Loader export HDFS data to?

Question86: Which of the descriptions of the Loader job in FusionlnsightHD is correct?

Question87: Which of the following statements about the read/write process of the leader node of Zookeeper after receiving the data change request is correct?

Question88: What is the default resource scheduler for queues in YARN?

Question89: Which of the following options for providing multiple Redis1 optimizations is wrong?

Question90: The Streaming of Fusioninsight HD is developed based on the open source Apache Storm, which is a distributed offline computing framework.

Question91: What are the following main functions of FusionInsightManager?

Question92: In Huawei Fusioninsight, HBase's table design tool, connection pool management and enhanced $DK can simplify the business development of complex data tables.

Question93: Which object cannot be managed by Fusion Insight manager?

Question94: LdapServerff? ?(group) is to unify usersgroup managementreason. likefruituserAdd to? ?middle.? ?middle? ?record.

Question95: When a Regioni in HBaser performs the Split operation, what stage occurs in the process of actually dividing an HFile file into two Regions?

Question96: SELECT aa.salarybB. address FROM employee aa JoiN SELECT adress FROM employee info where provine='zhejiang') What types of operations does bb ONaa.nanme=bB. name contain?

Question97: ElasticSearch can be used as a relational database similar to MySQL.

Question98: Fusionlnsight HD cluster upgrade, which of the following descriptions are correct?

Question99: Which of the following operations cannot be recorded in the Fusioninsight HD system audit log( )

Question100: The UNION ALL operator in Hive is used to combine the result sets of two more SELECT statements. Duplicate values are not allowed in the result set.

Question101: On the Fusioninsight Manager interface, when an alarm of insufficient disk capacity of Kafka is received, and the cause of the alarm has been eliminated from the hard disk hardware failure, the system administrator needs to consider expanding the capacity to solve this problem.

Question102: Streaming of Fusioninsight HD is weakly dependent on Zookeeper, even if Zookeeperd fails, Streaming can provide services normally.

Question103: The following description about Flink barrier is wrong ( )

Question104: Indataduring stream processing. eachthingpieceTimeWhich of the following three can be divided into?

Question105: F1ume supports monitoring and transmission of newly added files in the directory, enabling data transmission. Which type of source is described above?

Question106: inWebHCatin the architecture. Users can use the secureHTTPSprotocolexecuteDo which of the following actions?

Question107: On the Fusionlnsight Manager interface, when the kafka disk capacity insufficient alarm is received, and the cause of the read alarm has been eliminated from the disk hardware failure, the system administrator needs to consider expanding the capacity to solve the problem. )

Question108: The processing logic of topology is in bolt.

Question109: When the Hive service status is displayed as Bad on the Fusioninsight Manager interface, what are the possible reasons?

Question110: Fusioninsight Manger supports REST interface, SNMP interface and SYSLOG interface externally

Question111: What are the functions of Nimbus in the Streaming architecture?

Question112: What application scenarios is HBase not suitable for?

Question113: HDFSmiddle,piece(BlocThe size of k) is much larger than the smallest singleYuan,can be minimalchangeSearchingsiteout of the box.

Question114: Which parameter needs to be configured to enable the log aggregation function of the YARN component in the Hadoop platform?

Question115: What are the main features of the YARN capacity scheduler

Question116: Among the Kerberos service roles, KerberosServer mainly provides authentication functions, and KerberosAdmin mainly provides user management functions.

Question117: In Hive, which of the following statements about partitions is incorrect

Question118: What is the data scale unit of traditional data processing?

Question119: When creating a Loaderf job, in which of the following steps can the filter type be set?

Question120: 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:

Question121: What is the default resource scheduler in YARN?

Question122: The main difference between YARN-client and YARN-cluster is the difference between the Application Master process.

Question123: In the WebHCat architecture, which of the following operations can users perform over the secure HTTPS protocol

Question124: Regarding the ControllerNodeAgent in FusionlnsightManager, which statement is correct?

Question125: Which of the following factors contributed to the vigorous development of the era of big data?

Question126: Flume supports cascading multiple Flume, and at the same time, the cascade node supports old data replication.

Question127: 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?

Question128: In the Fusioninsight product, which of the following descriptions are correct about the topic of creating Kafka?

Question129: The core concept of MapReduce is to decompose a large computing task into each node of the cluster to make full use of cluster resources to shorten the running time.

Question130: A user needs to build a FusionInsightHD cluster with 350 nodes. Which planning solution is the best?

Question131: FusionlnsightHD uses the HBase client to write 10 pieces of data in batches. A Regionserver node contains 2 Regions of the table, A and B, respectively. Two of the 10 pieces of data belong to A.
4 belong to B.
Clearly write How many RPC requests do I need to send to the Regionserver to enter these 10 pieces of data?

Question132: P? ?need? ?receive? ?Confirmation issued after? ?signal, when setting the MC?numbered?How many times means at least used? ?write?Le?, but does not require writing? ?write?

Question133: AboutHDFSdataFinishIntegrity guarantee, which of the following mechanisms isMistakeof?

Question134: A telecommunications companyplanopenexhibitionBigdatabusiness,target businesshavecustomer grouping,calendarHistorical bill analysis, real-time call charge analysis and other services. Which of the following options is the most appropriate in terms of functionality and cost to meet business needs?

Question135: What is the file format of data storage in HBase?

Question136: Which of the following indicators belong to flume data monitoring?

Question137: Where is the HBase metadata Meta Regioni routing information stored?

Question138: Huawei Fusioninsight HD is the first big data platform in China that complies with national financial and other garbage protection. What are the following aspects of its security?

Question139: What are the main features of HBase?

Question140: Huawei has extensive experience in big data solutions in various industries such as finance, public security, railways, and government affairs.

Question141: Which of the following options in HBaser command has the worst performance

Question142: KerbarasAs a certification service center,were ableSecondary development applications to all services in the cluster and customerscarryforsystemA certification service.

Question143: In Hadoop, if yarn.scheduler.capacity.root.Queue A.
minimum-user-limit-percenti is set to 50, which of the following statements is wrong?

Question144: Which of the supervisor descriptions of Fusioninsight HD Streaming is correct?

Question145: After the Loadert job in Fusioninsight HD is submitted to YARN, the job cannot be manually stopped.

Question146: Which of the following designs are mainly considered in the planning process of the big data business consulting service plan?

Question147: Which instance must the Loader instance be deployed with in FusionlnsightHD?

Question148: 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?

Question149: F1ink is a unified computing framework that combines batch processing and stream processing. Its core is a stream data processing engine for data distribution and parallel computing.

Question150: The overall process of Kafka Produceri reading data is that the Producer connects to any surviving Broker, requests the leader metadata information of the specified topic and partition, and then directly connects with the corresponding Brokerl to publish the data.

Question151: Which of the followingOSWhich version is recommended for building a Fusioninsight V1R2C60 cluster?

Question152: The kafka logs segment file naming rule is the first segment of the global partion/starting from o, and each subsequent segment file is named the maximum offset (offset message number) of the previous global partionE.

Question153: kafka Distributed message delivery is based on reliable message queues. Which of the following two main message delivery patterns are included?

Question154: Are the following descriptions correct about the HBase file storage module (HBase FileStream, HFS for short)?

Question155: The label-based scheduling of YARN is to label which of the following options?

Question156: In the HDFS mechanism, NameNodet is responsible for managing metadat
a. Each read request on the Clienty side needs to read metadata information from the metadata disk of NameNode, so as to obtain the location of the read file in DataNodel.

Question157: When viewing the partition details of a TopicE of Kafka, which command should be used?

Question158: In the FusionInsight cluster, which of the following components does Spark mainly interact with?

Question159: Channel supports transactions and provides weaker order guarantees. Any number of Sources and Sinks can be connected.

Question160: In FusionlnsightHD, which of the following components does Flink mainly interact with

Question161: To set the maximum resource usage of QueueA in YARN, which parameter needs to be configured?

Question162: There are currently 3 racks of a file that needs to be stored in 3 copies. Copy 1 and copy 2 are stored on the same rack as the client and on different servers. According to the HDFS replica placement strategy, it must be stored in other racks.

Question163: In the F1ink technical architecture,( )is a computing engine for stream processing and batch processing

Question164: In the FusionlnsightHD product, which statement about the Kafka component is correct?

Question165: When deploying Solr on Fusioninsight HD, if you choose to store the index on the local disk, it is recommended to mount a separate disk for the data directory of each SolrServer instance, and configure the disk as RAID0 or RAID5.

Question166: What are the storage formats supported by Hive in the Fusioninsight HD system?

Question167: Loaderf only supports data import and export between relational databases and HBase.

Question168: HUAWEI CLOUD MapReducel service provides a one-stop enterprise-level big data cluster cloud service that is fully controllable by tenants. It is fully compatible with open source interfaces, and combines HUAWEI cloud computing, storage advantages and big data industry experience to provide customers with high performance and low cost.
This flexible and easy-to-use full-stack big data platform can easily run Hadoop, Spark.HBase, Kafka, Storm and other big data components, realize real-time and offline analysis and mining, and discover new business opportunities for enterprises.

Question169: Kafka cluster during runtime,Directly depend on the following components?

Question170: The following cloud search service CSSIs the description correct?

Question171: What is wrong about the architecture description of Hive in Fusionlnsight HD?

Question172: FlinkmiddleWatermarkmechanism useduntiedecidechaossequenceproblem.WatermarkCan it be produced in the following way?

Question173: The following statements about the reliability of Fusioninsight network security are correct:

Question174: 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.

Question175: Regarding the task selection of the capacity scheduler, which of the following statements is true( )

Question176: Synchronizing data between partition replication in Kafka, copying data from the leader of the partition to the follower requires a thread (replicationFetcherThread) follower (a follower is equivalent to a consumer) to actively pull messages from the leader in batches, which greatly improves throughput.

Question177: In a point-to-point messaging system, data in the queue can be consumed by one or more consumers, but a message can only be consumedoneSecond-rate.

Question178: When Fusionlnsight HD products deploy Kerberos and LDAP services, which of the following descriptions are correct?

Question179: When a MapKeduce program runs, the Map? ?malfunction. Which of the following options describe this task correctly?

Question180: When the loader in Fusioninsight HD imports files from the SFTP server, which of the following file types does not require encoding conversion and data conversion and is the fastest?

Question181: In the Fusioninsight product, which statement is correct about the Kafka component?

Question182: ApplicationMasters apply for and receive resources from ResourceManagerl through the RPC protocol in a polling manner.

Question183: In the replica placement strategy of HDFS, what is the distance between different servers in the same rack?

Question184: If the data producer needs to decide to send data to a certain task of the target Bolt. Which of the following message publishing strategies should be selected

Question185: 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.

Question186: What is the core module of spark?

Question187: Zookeeper enhancements include adding ephemeral nodes to audit logsDeleted audit logs.

Question188: Which of the following descriptions about Hive log collection on the Fusioninsight Manager interface is incorrect?

Question189: systemDuring the authentication process, all Kerbero evidence,BagContains the user's password. The user's affiliated information needs to be downloaded from( )Obtain.

Question190: What items can FusionInsight Manager perform health checks on?

Question191: When creating a Loader job, in which of the following steps can the number of Maps be set?

Question192: In the replica placement strategy of HDFS, what is the distance between different servers in the same rack?

Question193: When deploying Fusioninsight HD, how many FlumeServer nodes are recommended to be deployed in the same cluster?

Question194: Which of the following scenarios does Hive not apply to?

Question195: Which of the following are the built-in string functions of Hive?

Question196: Similar to Spark Streaming, Flink is an event-driven real-time streaming system

Question197: ElasticSearch is strongly dependent on Zookeeper.

Question198: In the Loader of Fusioninsight HD, one connector can only be assigned to one joB.

Question199: In the Output stage, Structured Streaming can define different data writing methods, including which of the following methods?

Question200: Streaming:Event listening is mainly implemented through which of the following services provided by Zookeeper?

Question201: ElasticSeArch expansion fieldKing Packageincluding whichsome?

Question202: What are the following main functions of Fusioninsight Manager?

Question203: The correct steps for data transformation in Fusioninsight HD are

Question204: 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

Question205: Which description about HIVE is incorrect?

Question206: HBase pass( )Quickly determine that user data does not exist.

Question207: Which of the following statements about segment file in Kafka Logs is correct?

Question208: What does Fusioninsight HD HBase use by default as its underlying file storage system?

Question209: Which of the following functions can the Kafka Cluster Mirroring tool achieve?

Question210: Multiple channels can be configured in the properties.protertises configuration file of Flumef to transmit data

Question211: Through the unified user management system in the big data platform, the unified management of users, roles and organizations of various open source component application systems in the platform can be realized. Cross-domain single sign-on, log-out and unification between various application systems can be realized. identity authentication function.

Question212: Which service process manages the Region of HBasel?

Question213: When creating a Loaderf job, in which of the following steps can the filter type be set?

Question214: Which nodes are required to communicate with external data sources before and after the Fusioninsight HD Loader job?

Question215: HDFSIs andeploypoints on the clusterclothfile system, becausethis,many numbersaccording toneedPassover gridEnterRowtransmission,the following aboutCommunication of HDFS?Which one of the protocol descriptions is wrong??

Question216: When executing the HBases data reading business, which parts of the data need to be read?

Question217: The emergence of HFS solves the need to store a large number of small files (below 10MB) in HDFS. At the same time, it is necessary to store some mixed scenes of large files (above 10MB)

Question218: Which of the following are the characteristics of ElasticSearch?

Question219: What component does HBase use by default as its underlying file storage system?

Question220: Regarding RDD, which of the following statements is wrong?

Question221: A large enterprise needs to do log analysis, operation and maintenance monitoring,searchWith recommendation, database acceleration, can be used for the enterpriseWhich are recommendedwork?

Question222: Which of the following scenarios is not applicable to Hive?

Question223: Elastic SearchofSowleadCanbystoragein a variety ofstorage classtype,andthe followingwherekind of storagekindtypebranchhold?

Question224: What are the key features of Streaming in Huawei's big data product Fusioninsight HD?

Question225: Which of the following processing methods is unreasonable when the window has been closed and the calculation result has been produced when the delayed event occurs?