EMT Practice Test

1. Question Content...

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Question1: ApplicationMaster applies for and receives resources from ResourceManager through the RPC protocol in a polling manner.

Question2: Which of the following statements about ZKFC is wrong?

Question3: Where is the Meta Region routing information of HBase metadata stored in?

Question4: kafka logs segment file naming rule is that the first segment of the global partition starts from 0, and each subsequent segment file is named the maximum offset (offset message number) of the previous global partition.

Question5: The most basic unit of distributed storage in HBase is Region.

Question6: The underlying data of HBase exists in the form of?

Question7: The correct installation process for installing Fusioninsight HD is

Question8: What are the performance bottlenecks of traditional data processing?

Question9: Which statement about the DataNodel of HDFS in Huawei Fusioninsight HD system is correct?

Question10: What physical resources does Redis mainly consume?

Question11: What kind of computing tasks are the MapReduces components in Hadoop good at?

Question12: Which of the following descriptions are correct about Fusionlnsight HD cluster upgrade? (Multiple choice)

Question13: In the flume architecture, a Source can be connected to multiple channels.

Question14: LdapServer's Group (group) is a unified group management for users. If a user is added to the group, the member's dn record will be added to the nember attribute of the group.

Question15: Fusioninsight tool is a set of health detection tools provided for technical support engineers and maintenance engineers. It can check the health status of cluster-related nodes and services, discover potential problems in the cluster in advance, and generate health check reports. It is convenient for technical support engineers and maintenance engineers to quickly understand the health status of the system.

Question16: Which of the following functions can Spark provide? (Multiple choice)

Question17: An Executorl of a Spark task can run multiple tasks at the same time

Question18: Flink provides built-in state management that canput at workstatesave atFlin1k internal,AgainNo need to store it in an external systemsystem. SuchThe benefits include which of the following options

Question19: Which module in Hadoop is responsible for data storage in HDFS?

Question20: The "Group by" in Hive refers to dividing a data set into several small data sets through certain rules, and then performing data grouping processing for several small data sets.

Question21: What are the main features of the YARN capacity scheduler

Question22: "Group by" in Hive refers to dividing each data set into several small data sets through certain rules, and then performing data grouping processing for several small data sets.

Question23: Through observation, it can be concluded that the final T3 calculation result is?

Question24: Spark Streaming calculation is based on DStream, which decomposes streaming calculations into a series of short batch processing jobs.

Question25: Flink supports local mode and cluster mode deployment, other mode deployments are not currently supported.

Question26: What are the usual guarantees for Kafka message transmission? (Multiple choice)

Question27: Use the Hbase client to write 10 pieces of data in batches.
An HRegionServer node contains 2 Regions of the table, namely A and B.
6 of the 10 pieces of data belong to A and 4 belong to B.
Please write How many RPC requests need to be sent to HRegionServer for these 10 pieces of data?

Question28: 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?

Question29: What is wrong with the description of the TWink capacity mechanism?

Question30: Which of the following commands deletes files?

Question31: Which nodes are required to communicate with external data sources before and after Fusioninsight HD Loader job?

Question32: Which of the description of HIVE is wrong?

Question33: Which of the following key features are included in the Zookeeper? (Multiple choice)

Question34: The smallest processing unit of HBase is Region, and the routing information between User Region and RegionServer is stored in Zookeeper.

Question35: Which of the following extensions belong to ElasticSearch?

Question36: The correct steps for data transformation in Fusioninsight HD are

Question37: Zookeeper's scheme authentication method does not include which of the following?

Question38: HUAWEI CLOUD MapReducel service provides tenants fully controllable - one-stop enterprise-level big data cluster cloud service, fully compatible with open source interfaces, combined with HUAWEI cloud computing, storage advantages and big data industry experience, to provide customers with high-performance, low-cost, The flexible and easy-to-use full-stack big data platform can easily run big data components such as Hadoop, Spark, HBase.Kafka, Storm, etC. Real-time and offline analysis and mining to discover new business opportunities.

Question39: Which of the followingOSWhich version is recommended for building a Fusioninsight V1R2C60 cluster?

Question40: The following statements about Kafka Partitioni are correct

Question41: Regarding the Flink barrier, which of the following is incorrect?

Question42: Which one of the following is a node of ElasticSearch?

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

Question44: What are the key features of Streaming in Huawei's big data product Fusioninsight HD? (Multiple choice)

Question45: Redis uses the exist command to determine whether a key exists.

Question46: If you want to add 1 to the digital value stored in the Key, which command should be used?

Question47: What is the physical storage unit of Region in HBase?

Question48: In Hive architecture, ( ) groupPiece is responsible for table, columnand Partition etC. yuandataRead, write and update operations

Question49: In the Hadoop platform, to view the information of an application in the YARN service, what command is usually used?

Question50: In the task scheduling process of YARN, which of the following is the task that the Application Master is responsible for?

Question51: The picture below shows Sparke&MapReduce performance comparison data, it can be concluded that compared with MapReducei computing, Spark uses( )resources, get( )double the performance?

Question52: After submitting the topology using the Streaming client shell command in the Fusioninsight HD system, using the Strom UI to view it, it is found that the topology has not processed data for a long time. What are the possible reasons? (Multiple choice)

Question53: The following offin Kafka messagesWhich one of the speed transmission methods is still correct?

Question54: Fusioninsight Manger supports REST interface, SNMP interface and SYSLOG interface externally

Question55: What information does a Key Value format in the HBase data file HFiler contain?

Question56: What types of data sources does F1ink stream processing include?

Question57: Which of the following statement about ZKFC is incorrect?

Question58: What are the main characteristics of big data analysis related technologies?

Question59: Colocation file-level colocation realizes fast file access, avoiding a large amount of network overhead caused by data relocation.

Question60: Which of the following HDFS commands can be used to check the integrity of data blocks?

Question61: Kafka is a distributed message publishing and subscribing system. It only forwards messages and does not save messages.

Question62: Which of the following are the functions that Spark can provide?

Question63: Through the unified user management system in the big data platform, unified management of users, roles and organizations of various open-source component application systems in the platform can be realized, and cross-domain single sign-on logout and unified identity authentication function among various application systems can be realized.

Question64: 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

Question65: In an MRS cluster, which of the following components does Spark mainly interact with?

Question66: In the Fusioninsight HD system, which of the following methods cannot view the results of Loader job execution?

Question67: The following description about the flink window is wrong

Question68: Which of the following are important roles of Spark? (Multiple choice)

Question69: All ZooKeeper nodes can process read requests.

Question70: In order to optimize performance, it is recommended to deploy LdapServer and KrbServer on the same node in all clusters.

Question71: Which of the following statements about Fusioninsight network security and reliability are correct? (Multiple choice)

Question72: Which of the following belongs to the shufle mechanism in the MapReduce process?

Question73: What configuration files can the Fusioninsight HD LLD configuration planning tool generate? (Multiple choice)

Question74: In the Fusionlnsight HD cluster, there are currently 300 nodes in the cluster. If the recommended deployment scheme is adopted, which partitions will definitely not exist on the control node? (Multiple choice)

Question75: In Flink( )Interface for streaming data processing.( )interface for batch processing

Question76: YarnWhen doing resource scheduling, maptaak and reduceTask are run in( )middle.

Question77: When viewing the partition details of a TopicE of Kafka, which command should be used?

Question78: When using the configuration planning tool to plan the Fusioninsight HD V100R002C50 cluster, you can use the configuration planning tool of the V100R2002C60 version to plan.

Question79: In Flink, the checkpoint mechanism can ensure that when the application fails during operation, it will be restored from a certain checkpoint. In this process, the stream snapshot is established based on the data inflow.

Question80: Which of the following is the ElasticSearch node?

Question81: Which of the following options belong to Fusioninsight data security?

Question82: 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)

Question83: In order to improve the fault tolerance of Kafka, Kafka supports the replication strategy of partition. Which of the following descriptions about Leader partition and Follower partition is wrong?

Question84: The memory size allocated by YARN to the Container in the Hadoop system can be set by the parameter yarn.app.mapreduce am.resource.mb.

Question85: The label-based scheduling of YARN is to label which of the following options?

Question86: In the collaborative work of Zookeeper and YARN, when Active ResourceManager fails, which of the following directories will Standby ResourceManager obtain application-related information from?

Question87: All Zookeeper nodes can handle requests

Question88: Kunpeng computing industry is a full-stack IT infrastructure, industry applications and services built on Kunpeng processors, including PCs, servers, storage, operating systems, middleware, virtualization, databases, cloud services, industry applications, and consulting management services Wait.

Question89: KerbarasAs a certification service center,were ableSecondary development applications to all services in the cluster and customerscarryforsystemA certification service.

Question90: From the perspective of life cycle, which stages do data go through? (Multiple choice)

Question91: After the FusionlnisghtHD cluster is successfully installed, it is not allowed to modify the configuration of services, roles, and instances.

Question92: Regarding the Kafka message consumer reading the message, which of the following is wrong?

Question93: Which of the following statements about the LdapServer organizational model is correct?

Question94: Which of the following about the Install Fusioninsight HD installation process is correct?

Question95: HUAWEI CLOUD MapReduce service provides tenants fully controllable one-stop enterprise-level big data cluster cloud service, fully compatible with open-source interfaces, combined with HUAWEI cloud computing, storage advantages and big data industry experience, to provide customers with high performance, low cost, the 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.

Question96: What types of operations are included in "SELECT aa.salary, bb.address FROM employee aa JoiN SELECT adress FROM employee info where provine= 'zhejiang') bb ON aa.nanme=bb.name? (Multiple choice)

Question97: Which of the following options for providing multiple Redis1 optimizations is wrong?

Question98: The secondary index provides HBase with the ability to index according to the value of some columns. The secondary index first searches the index table, and then locates the position in the data table, without full table scan

Question99: HBasoTo achieve the scale of bench drills with billions of accidents and millions of columns, which of the following options is required?

Question100: Multi-select Hive components can support multiple interfaces, which of the following interfaces is not supported

Question101: The following descriptions about FusionInsight multi-tenant management are correct

Question102: HDFS supports large file storage, and supports multiple users' write operations to the same file, as well as modification at any position of the file.

Question103: Which of the following descriptions about Hive features is incorrect?

Question104: HDFS supports large file storage, and supports multiple users to write to the same file, as well as modify any location of the file.

Question105: In Huawei Fusioninsight HD, which of the following components are Flink strongly dependent on? (Multiple choice)

Question106: In Flink, the checkpoint mechanism can ensure that when an application fails during operation, it can be restored from a certain checkpoint. In this process, stream snapshots are created in sequence according to the order of data inflow.

Question107: DataSet from Spark2.0Officially enabled, it has the characteristics of both DataFrame and RDD, and RDD is no longer used.

Question108: Regarding the Controller and NodeAgent in FusionlnsightManager, which statement is correct?

Question109: Kunpeng computing industry is a full-stack I1 infrastructure, industry applications and services built on the Kunpeng processor, including PCs, servers, storage, operating systems, middleware, virtualization, databases, cloud services, industry applications and consulting management services Wait.

Question110: In Fusioninsight HD, which of the following does not belong to the flow control feature of Hive? (Multiple choice)

Question111: Which of the following options are action operators?

Question112: Which of the following options does the time operation type supported by F1ink include?

Question113: When a Regioni in HBaser performs the Split operation, what stage occurs in the process of actually dividing an HFile file into two Regions?

Question114: The streaming client shell command in the FusionInsight HD system fails to view the topology or submit the topology. Which of the following positioning methods are correct?

Question115: Which of the following descriptions about the characteristics of Kafka Partition replicas is correct?

Question116: What can the unified certification management system of mainstream manufacturers consist of?

Question117: Which of the following commands delete files?

Question118: When viewing the partition details of a topic in Kafka, which command is used as follows?

Question119: Which parts of the data need to be read to execute the HBase data reading business?

Question120: Which operations in Hive can be merged?

Question121: When importing data to the Hive table, the validity of the data will not be checked, only when the data is read.

Question122: Which of the following are the main functions of Fusion Insight Manager? (Multiple choice)

Question123: In the Mapreducei process, by default, a shard is a block and a mapTask.

Question124: Spark on YARN-client is suitable for production environments because you can see the output of the APP faster.

Question125: Which of the following statements about the interaction between F1ink and other components is correct?

Question126: 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.

Question127: In the task scheduling process of YARN, which of the following is the task that the ApplicationMaster is responsible for?

Question128: In the Fusioninsight HD product, a typical kafka cluster contains several producers, thousands of consumers and a zookeeper cluster?

Question129: In F1ink, the checkpoint mechanism can ensure that when the application fails during operation, it can recover from a certain checkpoint. During this process, stream snapshots are created in sequence according to the order of data inflow.

Question130: Map Reducein MaThe combine in stage p is a pre-grouping process and is optional.

Question131: In the HDFS federated environment, which of the following contents are included in the NameSpace

Question132: In MapReduce programming, code not only describes what to do, but also how to do it.

Question133: In a Fusioninsight HD V100R002C60 cluster, which of the following components need to be partitioned for metadata?

Question134: In the Fusioninsight HD system, if a Loader node in the cluster is abnormal and other services are not abnormal, the normal use of Loader service functions will not be affected.

Question135: When a RegionServer fails, the Region on the failed RegionServer is migrated. (fill in the blank)