EMT Practice Test

1. Question Content...

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Question1: When installing the Streaming component of Fusioninsight HD, the Nimbus role requires how many nodes to be installed?

Question2: The Huawei Cloud MapReduce 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's cloud computing, storage advantages, and big data industry experience to provide customers with high-performance, low-cost, Flexible and easy-to-use full-stack big data platform, easily run Hadoop, Spark, HBase, Kafka, Storm and other big data components. Realize real-time and offline analysis and mining to discover new business opportunities.

Question3: As shown in the figure, which of the following description about the Kafka message consumer reading the message is wrong?

Question4: The following figure shows the performance comparison data of Spark & MapReduce. It can be concluded that compared with MapReduce calculation, Spark uses ____ resources to obtain ____ times the performance?

Question5: What are the successful cases of Huawei Fusioninsight HD in the industry? (Multiple choice)

Question6: Hardware failure is considered normal. In order to solve this problem, HDFS designed a copy mechanism. By default, for a file, HDFS will save () copies?

Question7: Among the following options, which are the processes that MapReduce must have? (Multiple choice)

Question8: Regarding the task selection of the capacity scheduler, which of the following statements is correct? (Multiple choice)

Question9: Hadoop's NameNode is used to store the metadata of the file system.

Question10: In the WebHCat architecture, which of the following operations can users perform through the secure HTTPS protocol?

Question11: Which of the following components does the platform architecture of Huawei's big data solution include? (Multiple choice)

Question12: In the task scheduling process of YARN, which of the following tasks is the responsibility of the Application Master?

Question13: During the data collection process of Flume, which of the following options the data can be filtered and modified?

Question14: Flink is suitable for applications with high concurrency processing data and millisecond-level latency.

Question15: Which of the following statements about the segment file in Kafka Logs is correct? (Multiple choice)

Question16: An Executor of a Spark task can run multiple tasks at the same time

Question17: In order to ensure the reliability of the snapshot storage of streaming applications, where are the snapshots mainly stored?

Question18: When the Fusioninsight HD cluster has a three-layer network, it is recommended to install the management nodes, control nodes, and data nodes in different network segments to improve reliability.

Question19: Each stage of a Spark task can be divided into jobs, and the division mark is shuffle.

Question20: Which of the descriptions about ordinary tables and external tables in Hive is wrong?

Question21: With the continuous increase of the volume of big data, the requirements for the physical security of data storage are getting higher and higher, and the requirements for multiple copies of data and disaster recovery mechanisms are also raised.

Question22: What is the physical storage unit of Region in Hbase?

Question23: Assume that HDFS only saves 2 copies when writing data. Then during the writing process, HDFS Client first writes data to DataNode1 and then writes data to DataNode2. ()

Question24: Which of the following programming languages is implemented in Spark?

Question25: Compared with open source Sqoop, what are the enhanced features of Loader? (Multiple choice)

Question26: In the MRS service, if the Zookeeper service is unavailable, the Kafka service will be unavailable.

Question27: The following figure shows the label storage strategy of HDFS. Observe the following figure, which data nodes will the HBase data be stored on? (Multiple choice)

Question28: The figure below shows the Flume data transmission architecture. What is the component at the "?" in the figure?

Question29: Batch processing of high-value and highly aggregated information and knowledge is the main business appeal of the big data industry

Question30: On the Fusionlnsight Manager interface, when receiving a warning that the kafka disk capacity is insufficient, and the cause of the read warning has been ruled out as a disk hardware failure, the system administrator needs to consider expanding the capacity to solve this problem.

Question31: Which of the following functions can the Shell script of Loader achieve? (Multiple choice)

Question32: In the Fusioninsight cluster networking design, Layer 2 networking refers to Layer 2 switching within the cluster, and the cluster nodes are in a subnet, which is applicable to cluster scenarios with less than 200 nodes.

Question33: In the Fusioninsight HD system, which LDAP data synchronization method is used?

Question34: Which of the following statements about the HBase secondary index is correct?

Question35: What is the index name of ElasticSearch?

Question36: The functions of Nimbus in the Streaming architecture include? (Multiple choice)

Question37: When FusionInsight HD products deploy Kerberos and LDAP services, which of the following descriptions is correct? (Multiple choice)

Question38: In the Loader of Fusioninsight HD, one connector can only be assigned to one job.

Question39: What is the core module of spark?

Question40: Which of the following functions can the Kafka Cluster Mirroring tool achieve?

Question41: Which process is described in the Map stage shown in the figure below?

Question42: HBase quickly judges that user data does not exist through ().

Question43: In the Mapreduce process, by default, a fragment is a block and a mapTask.

Question44: Which of the following options are used to configure the number of memory and CPU of NodeManager? (Multiple choice)

Question45: Which of the following statements about Zookeeper's Leader election is correct? (Multiple choice)

Question46: 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.

Question47: In the Hadoop system, if the backup factor of the HDFS file system is 3, then each time MapReduce runs the Task, it must transfer the file segments to be processed from 3 machines with copies.

Question48: C. The channel acts like a queue and is used to temporarily cache the incoming data. When the Sink successfully sends the data to the next-hop Channel or the final destination, the data will be removed from the Channel.

Question49: When planning a FusionInsight HD cluster, if the customer is used for functional testing and has no requirements for performance and cost savings, the management node, control node, and data node can be deployed in one. How many nodes are needed at least?

Question50: Which configuration does Fusioninsight Manager user rights management not support?

Question51: In many small file scenarios, Spark will start many tasks. When there is a Shuffle operation in the SQL logic, the number of hash buckets will be greatly increased, which will seriously affect the performance. In Fusioninsight, the () operator is usually used for small file scenarios to merge the partitions generated by the small files in the Table to reduce the number of partitions, so as to avoid generating too many hash buckets during shuffle and improve performance.

Question52: What data will Fusionlnsight Manager regularly back up? (Multiple choice)

Question53: Which of the following is not a state store supported by Flink?

Question54: Which of the following application scenarios can HBase be used for? (Multiple choices)

Question55: Multi-choice Hive components can support multiple interfaces, which of the following interfaces is not supported? (Multiple choice)

Question56: Which of the following statements about the comparison between Sparkstreaming and Streaming is wrong?

Question57: Which of the following are extensions of ElasticSearch? (Multiple choice)

Question58: Which service process is used to manage the Region of HBase in the Hadoop platform?

Question59: Which of the following descriptions of cloud search service CSS is correct? (Multiple choice)

Question60: In creating a Loader job, which of the following steps can set the filter type?

Question61: One of the goals of the data center technology architecture is to be able to solve the disadvantages that traditional data warehouses tend to become data islands and big data platforms tend to become data swamps.

Question62: Which of the following options are Huawei Cloud MRS advantages? (Multiple choice)

Question63: Which of the following designs are mainly considered in the planning process of the big data business consulting service plan? (Multiple choice)

Question64: A user information table meg_table is saved in the HBase of Fusioninsight HD, Rowkey is the user id, and one column is the user nickname. Now write three KeyValues into this column in order: 001: Li, 001: Mary, 001: Lily, excuse me, which data will be returned by scan' meg_table' (VERSION=>2)?

Question65: When planning and deploying a Fusionlnsight cluster, it is recommended to deploy _ ___ management nodes, at least ____ control nodes, and at least _____ data nodes.

Question66: In the collaborative work of Zookeeper and YARN, when the Active Resource Manager fails, which of the following directories will the Standby Resource Manager obtain Application-related information?

Question67: Flink is a computing framework combining batch processing and stream processing. Its core is a stream data processing engine for data classification and parallel computing.

Question68: Which of the following sub-products does the Fusioninsight family include? (Multiple choice)

Question69: As a distributed message system, Kafka supports online and offline message processing, and provides a java API for other components to connect and use. In the Fusioninsight solution, Kafka belongs to the Fusionlnsight HD module.

Question70: Which of the following belongs to DDL (data definition language) in Hive SQL? (Multiple choice)

Question71: In MapReduce programming, the code should not only describe what to do, but also how to do it.

Question72: Which component controls the active/standby arbitration in HDFS?

Question73: Which of the following installation process of Fusioninsight HD is correct?

Question74: Which statement about HBase components is correct? (Multiple choice)

Question75: In Zookeeper's service model, the Leader node exists in active/standby mode, and the other nodes belong to the Follower nodes.

Question76: Which of the following statements about CarbonData in Fusioninsight is correct? (Multiple choice)

Question77: In which of the following links is the data conversion operation of Flink completed?

Question78: If some information is allowed to be lost during message processing, which of the following methods can be used to close the message reliability processing mechanism? (Multiple choice)

Question79: In order to improve the fault tolerance of Kafka, Kafka supports partition replication strategy. Which of the following descriptions about Leader partition and Follower partition is wrong?

Question80: Which parameter needs to be configured to enable the log aggregation function of the YARN component on the Hadoop platform?

Question81: The HDFS data reading process includes the following steps, please select the correct order.

Question82: The capacity scheduler is allocating resources. There are two queues Q1 and Q2 at the same level, both of which have a capacity of 30, of which 8 have been used by Q1 and 14 have been used by Q2, and resources will be allocated to Q1 first.

Question83: Which of the following is a node of ElasticSearch?

Question84: The order in which the YARN scheduler allocates resources, which of the following descriptions is correct?

Question85: Fusioninsight HD Manager interface Hive log collection, which option is wrong?

Question86: Which of the following descriptions about the function of HMaster in HBase is correct? (Multiple choice)

Question87: All Kafka messages will be persisted to the hard disk. At the same time, Kafka ensures data reliability by setting Replication for Topic Partitio.

Question88: What interfaces does Fusioninsight Manager support when connecting with external platforms? (Multiple choice)

Question89: How many copies of HDFS blocks are saved by default in the Fusionlnsight HD system?

Question90: Which of the following description about Kafka is wrong?

Question91: Fusioninsight Manager's statement about the configuration function of the service is wrong?

Question92: What information does a KeyValue format contain in the data file HFile of HBase? (Multiple choice)

Question93: In Kafka, which of the following statement about Producer sending data is wrong? (Multiple choice)

Question94: Which of the following are the characteristics of ElasticSearch? (Multiple choice)

Question95: What are the main characteristics of technologies related to big data analysis? (Multiple choice)

Question96: When the size of a Region gradually increases in HBase, it may be pruned.

Question97: Which of the following are conversion rules supported by Loader jobs? (Multiple choice)

Question98: What data types of application scenarios are HBase of Hadoop not suitable for?

Question99: What does Fusioninsight HD HBase use by default as its underlying file storage system?

Question100: What kinds of guarantees are there for Kafka message transmission? (Multiple choice)

Question101: The default snapshot method of Redis is AOF.

Question102: 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 also necessary to store some mixed scenes with large files (10MB or more)

Question103: When executing the HBase data reading business, which parts of the data need to be read? (Multiple choice)

Question104: What methods or interfaces does Loader provide for job management? (Multiple choice)

Question105: "Group by" in Hive refers to dividing each data set into several small data sets through certain rules, and then grouping data for several small data sets

Question106: Among Fusioninsight HD products, which statement about Kafka is wrong?

Question107: Fusionlnsight HD cluster upgrade, which of the following descriptions is correct? (Multiple choice)

Question108: Spark's intermediate data is placed in memory, which is more efficient and has higher latency for iterative operations and batch calculations.

Question109: In the Fusioninsight product, which of the following descriptions about the kafka topic is wrong?

Question110: Which is not the channel type of Flume?

Question111: HBase's BloomFilter is used to filter data.

Question112: The combine of MapReduce in the Map stage is a pre-grouping process, which is optional.

Question113: Which parameter needs to be configured to set the maximum amount of resources used by queue QueueA in YARN?

Question114: In YARN, which of the following tasks is the "slave" node responsible for? (Multiple choice)

Question115: Which of the following description about HBase's Region Split process is wrong?

Question116: In Fusioninsight products, which of the following descriptions are correct about creating Kafka topics?

Question117: Assuming that the amount of data is about 200GB, and the maximum capacity of shards is limited to 30GB, what is the maximum number of shards that should be designed?

Question118: Which of the following scenarios is Spark suitable for? (Multiple choice)

Question119: Which of the following options are suitable for MapReduce?

Question120: Which of the following measures are used to protect the integrity of data? (Multiple choice)

Question121: The smallest processing unit of HBase is Region, where is the routing information between User Region and Region Server stored?

Question122: Which components in the Fusioninsight HD platform support table and column encryption? (Multiple choice)

Question123: Which of the following commands downloads a directory/file from HDFS to the local?

Question124: The fault-tolerant mechanism of Spark Streaming means that any partition error in RDD can be recalculated and generated according to its parent RDD. If the parent RDD is lost, you need to find the original data in the disk.

Question125: Zookeeper's scheme authentication method does not include which of the following?

Question126: In the HDFS mechanism, the NameNode is responsible for managing metadata. Each read request on the client side needs to read metadata information from the metadata disk of the NameNode to obtain the location of the read file in the DataNode.

Question127: When Solr creates a Collection, it is recommended to use compositld Router as the routing algorithm, so that the Collection can expand shards.

Question128: Assume that the minimum resource guarantee for each user is set to YARN.scheduler.capacity.root.QueueA.minimum-
User-limit-percent=25, then which of the following statement is wrong?

Question129: As shown in the figure, which of the following options are wide dependencies? (Multiple choice)

Question130: Among the Fusionlnsight HD products, which statement about the Kafka component is correct? (Multiple choice)

Question131: Which statement about DataNode of HDFS in Huawei Fusioninsight HD system is correct?

Question132: Which of the following commands can clear the data of all databases under the Redis instance?

Question133: Spark on YARN-client is suitable for production environments because you can see the output of APP faster.

Question134: Loader only supports data import and export between relational databases and HBase.

Question135: Which of the following are the functions that Spark can provide? (Multiple choice)

Question136: The enhanced features of Zookeeper include adding the audit log of ephemeral node deletion in the audit log.

Question137: Which of the following options are the advantages of Fusioninsight Spark SQL?

Question138: The storage formats supported by Hive in the Fusioninsight HD system include? (Multiple choice)

Question139: Huawei Cloud MapReduce service provides a one-stop enterprise-level big data cluster cloud service that is fully controllable by tenants. 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.

Question140: In the task scheduling of YARN. Once the Application Master applies for resources, it communicates with the corresponding Resource Manager and asks it to start the task

Question141: Which of the following types of data is not semi-structured data?

Question142: The naming rule of the kafka logs segment file is that the first segment of the global partition starts from 0, and each subsequent segment file name is the maximum offset (number of offset messages) of the previous global partition.

Question143: 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 Node Manager memory threshold, then the Container with excessive memory usage can still continue to run.

Question144: Redis supports multiple databases.

Question145: Spark is a memory-based computing engine, and all data during the running of Spark programs can only be stored in memory

Question146: When a RegionServer fails, the Region on the failed RegionServer is migrated by ().

Question147: Which way is the correct way to load data into the Hive table? (Multiple choice)

Question148: What is wrong about the architecture description of Hive in FusionInsight HD?

Question149: Does the underlying data of HBase exist in the form of __?

Question150: The driver in Spark on YARN mode can only run on the client.

Question151: Which of the following scenarios is HDFS not suitable for? (Multiple choice)

Question152: On the Fusioninsight Manager interface, which of the following options is not included in the loader operation?

Question153: What are the main features of HBase? (Multiple choice)

Question154: What is the file format of data storage in HBase?

Question155: HDFS supports large file storage, and supports multiple users to write to the same file at the same time, and to modify any position of the file.

Question156: In Hive, which of the following descriptions about partitions is wrong?

Question157: Regarding DataSet, which of the following statements is wrong?

Question158: Which of the following descriptions about the function of HRegionServer in HBase is wrong? (Multiple choice)

Question159: Which of the following commands belong to the set type? (Multiple choice)

Question160: Which of the following options does the type of time operation supported by Flink include? (Multiple choice)

Question161: Regarding the relationship between Hive and other components of Hadoop, which of the following descriptions is wrong?

Question162: In the process of MapReduce, which of the following belongs to the shuffle mechanism? (Multiple choice)

Question163: In the Fusioninsight Hadoop cluster, through df-hT query on a certain node, the partitions seen include the following:
/var/log
/srv/BigData
/srv/BigData/hadoop/data5
/srv/BigData/solr/solrserver3
/srv/BigData/dbdataom
What is the planning combination of the optimal Raid level for the disks corresponding to these partitions?

Question164: The nodes in the ElasticSearch cluster are divided into master and slave.

Question165: Which of the following aspects are reflected in the high reliability of Fusioninsight HD data? (Multiple choice)

Question166: Which component controls the active and standby arbitration of NameNode in HDFS?

Question167: From the point of view of the life cycle, what are the main stages of data? (Multiple choice)

Question168: Which of the following options belong to the data storage model of Hive?

Question169: server.channels.ch1.transactioncapacity indicates the transaction size, that is, the number of events that the current channel supports transaction processing, which can be set to the same size as the batch size of the source, but cannot be smaller than the batch size.

Question170: The following provides a variety of Redis optimization methods, which option is wrong?

Question171: Fusioninsight Manger supports external REST interface, SNMP interface, and SYSLOG interface.

Question172: When deploying Fusioninsight HD, it is recommended to deploy at least a few FlumeServer nodes in the same cluster?

Question173: Which of the following statements about Kafka Partition are correct? (Multiple choice)

Question174: When the Fusioninsight Manager interface shows that the Hive service status is Bad, what are the possible reasons? (Multiple choice)

Question175: Which of the following descriptions about Zookeeper features is wrong?

Question176: YRAN's label-based scheduling, which of the following options is used for labeling?

Question177: What is the unit of data scale for traditional data processing?

Question178: The main difference between YARN-client and YARN-cluster is the difference between the Application Master process.

Question179: Tez is a distributed computing frame that supports directed acyclic graphs. When Hive uses the Tez engine for data analysis, it will parse the HQL statement submitted by the user into the corresponding Tez task and submit it to Tez for execution.

Question180: According to how the data flow transmits data between two Transformations, what types of data flow can be divided into? (Multiple choice)

Question181: Which of the following options belong to Huawei Kunpeng industrial products? (Multiple choice)

Question182: All Zookeeper nodes can process requests

Question183: In Streaming, exactly one message reliability level is achieved through the ACK mechanism.

Question184: In order to consider performance optimization, it is recommended to deploy LdapServer and KrbServer on the same node in all clusters.

Question185: Which of the following factors have contributed to the vigorous development of the big data era?

Question186: Flume supports monitoring and transferring new files in the directory, which can realize data transfer. Which type of source is described above?

Question187: Which of the following is not a feature of the MapReduce component in Hadoop?

Question188: Which of the following descriptions about the data management and architecture faced by traditional enterprises is correct? (Multiple choice)

Question189: Kafka is a distributed message publishing and subscription system. It only forwards messages and does not save messages.

Question190: Which operations in Hive can be merged? (Multiple choice)

Question191: Which of the following descriptions about FusionInsight multi-tenant management is correct? (Multiple choice)

Question192: The secondary index provides HBase with the ability to index according to the value of certain columns. The secondary index first checks the index table, and then locates the position in the data table without scanning the entire table.

Question193: FusionInsight Manager manages services, which of the following statements is wrong?

Question194: In the Spark SQL table, there are often many small files (the size is much smaller than the HDFS block size). In this case, Spark will start more Tasks to process these small files. When there is a Shuffle operation in the SQL logic, It will greatly increase the number of hash buckets, which will seriously affect performance.

Question195: In Hive, which of the following descriptions about bucketing is correct? (Multiple choice)

Question196: ElasticSearch can be used as a relational database similar to MySQL.

Question197: Spark Streaming has higher real-time performance than Storm.

Question198: Which of the following is not a mandatory option when creating a Loader job?

Question199: The Group (group) of LdapServer is a unified group management for users. If a user is added to the group, the dn record of the member will be added to the member attribute of the group.

Question200: What is the role of the connector when Fusioninsight HD's Loader creates a job?

Question201: In the Huawei Fusioninsight HD cluster, which of the following services can the Spark service read data from? (Multiple choice)

Question202: Regarding the warning of insufficient Kafka disk capacity, which of the following analysis is wrong for the possible reasons?

Question203: When the Client of HDFS writes a file, the writing position of the first copy of the data is determined by the NameNode, and the writing position of other copies is determined by the Data Node.

Question204: What are the types of data node znodes in Zookeeper? (Multiple choice)

Question205: To execute the HBase data reading business, which parts of the data need to be read? (Multiple choice)

Question206: FLINK uses the checkpoint mechanism to ensure the fault tolerance of the application program.

Question207: In the YARN service, if the capacity of the queue QuqueA is to be set to 30%, which parameter should be configured?

Question208: What is the module used to manage the active and standby status of the Loader Server process in the Loader?

Question209: In a point-to-point message system, one or more consumers can consume the data in the queue, but a message can only be consumed once.

Question210: In order to reduce the amount of data written to disk, mapreduce supports compressing MOF (mapoutfile) before writing.

Question211: Which module in Hadoop is responsible for HDFS data storage?

Question212: Flink is a unified computing framework combining batch processing and stream processing. Its core is a stream data processing engine for data distribution and parallel computing.

Question213: Which statement about worker (work process), Executor (thread), and task (task) is correct?

Question214: When installing a Fusionlnsight HD cluster in safe mode, which components must be installed? (Multiple choice)

Question215: Kafka is a high-throughput, distributed, publish-subscribe-based messaging system. Using Kafka technology, a large-scale messaging system can be built on a cheap PC Server.

Question216: In the MRS cluster, which of the following components does Spark mainly interact with?

Question217: Flink can not only provide real-time computing that supports high throughput and exactly-once semantics, but also batch data processing.

Question218: SELECT a salary, b adress FROM employee a JoiN SELECT adress FROM Employee info where provine='zhejiang) b NO ananme=b.name: "What types of operations are included?" (Multiple choice)

Question219: Which command in Redis is to view the remaining lifetime of the key?

Question220: The data flow of Flume can be sent to different Channels according to the information of headers.

Question221: In the Fusioninsight HD system, which component does the flume data stream not pass through in the node?

Question222: There are two ways to clean up Kafka logs: delete and compact. The default value is delete.

Question223: Which is the correct description about Supervisor of Fusioninsight HD Streaming?

Question224: Which of the following statements about Transformation in Flink is correct? (Multiple choice)

Question225: Which statement about HIVE is wrong?

Question226: Which of the following nodes in HDFS is the ZKFC process deployed on? (Multiple choice)

Question227: Which of the following descriptions about the basic operations of Hive SQL is correct?

Question228: Which of the following commands deletes files?

Question229: Colocation (same distribution) The file-level co-distribution enables fast access to files and avoids a large amount of network overhead caused by data relocation.

Question230: Fusioninsight HD system audit log is unavailable to record which of the following operations?

Question231: Is the description of the role of the standby NameNode in the HDFS system correct? (Multiple choice)

Question232: Hive supports normal view and materialized view.