EMT Practice Test

1. Question Content...

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Question1: In the MapReduce process, which of the following are shuffle mechanisms? (Multiple choice)

Question2: Which of the following about the Install Fusioninsight HD installation process is correct?

Question3: Spark Streaming calculation is based on DStream, which decomposes streaming calculations into a series of short batch processing jobs.

Question4: Which of the following options belong to Hive's data storage model?

Question5: Flink's data conversion operation is completed in which of the following step?

Question6: Which of the following are actual application scenarios of Kafka? (Multiple choice)

Question7: Which of the following are the characteristics of ElasticSearch? (Multiple choice)

Question8: Using the Streaming client shell command in FusionInsight HD system to view the topology or submit the topology fails, which of the following positioning methods are correct? (Multiple choice)

Question9: What are the main characteristics of big data analysis related technologies? (Multiple choice)

Question10: When installing the Streaming component of Fusioninsight HD, how many nodes does the Nimbus role require to installed?

Question11: What methods or interfaces does Loader provide to implement job management? (Multiple choice)

Question12: When the Loader of Fusioninsight HD creates a job, what is the role of the connector?

Question13: RDD has Transformation and Action operators. Which of the following are Action operators?

Question14: Now server.channels=ch1 is available, set the Channel type to File Channel, which of the following configurations are correct?

Question15: Spark's intermediate data is stored in memory, which is more efficient for iterative calculations and batch calculations, and has higher latency.

Question16: The smallest processing unit of HBase is Region, and the routing information between User Region and RegionServer is stored in Zookeeper.

Question17: One of the goals of the data center technology architecture is to be able to solve the disadvantages of traditional data warehouses that tend to become data islands and big data platforms that tend to become data swamps.

Question18: With the continuous increase in the volume of big data, the requirements for the physical security of data storage are getting higher and higher, and higher requirements are put forward for multiple copies of data and disaster tolerance mechanisms.

Question19: On the FusionInsight Manager interface, when a Kafka disk capacity shortage alarm is received, and the cause of the read alarm has been eliminated from the disk hardware failure, the system administrator needs to consider capacity expansion to solve this problem.

Question20: In Kafka, which of the following statement about the data sent by the Producer is wrong? (Multiple choice)

Question21: What is the core module of spark?

Question22: In the Fusioninsight HD system, which of the following methods cannot view the results of Loader job execution?

Question23: Where is the Meta Region routing information of HBase metadata stored in?

Question24: Regarding the order of the YARN scheduler allocating resources, which one of the following descriptions is correct?

Question25: Hive is not suitable for which of the following scenarios?

Question26: When installing the Streaming component of Fusionlnsight HD, how many nodes are required to install by the Nimbus role?

Question27: Regardng the DataNode of HDFS in the Huawei Fusioninsight HD system, which of the following is correct?

Question28: In Fusioninsight products, about Kafka Topic, which of the following descriptions are incorrect?

Question29: Assuming that the minimum resource guarantee for each user is set to YARN.scheduler.capacity.root.QueueA. minimum-User-limit-percent=25, which of the following is wrong?

Question30: Flink supports local mode and cluster mode deployment, other mode deployments are not currently supported.

Question31: Which of the following statements about Kafka Partition are correct? (Multiple choice)

Question32: Which object cannot be managed by Fusion Insight manager?

Question33: In YARN, which of the following tasks is the "slave" node responsible for? (Multiple choice)

Question34: Which of the following descriptions of the HBase storage model are correct? (Multiple choice)

Question35: Which of the following descriptions of the characteristics of Kafka Partition copies are correct? (Multiple choice)

Question36: Which of the following descriptions is correct about the deployment of big data components on Kunpeng and X86 servers? (Multiple choice)

Question37: HDFS supports large file storage, and supports multiple users to write to the same file, as well as modify any location of the file.

Question38: The label storage strategy of HDFS, which data nodes will HBase data be stored on? (Multiple choice)

Question39: Which of the following is incorrect about the BloomFilter feature of HBase?

Question40: 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.

Question41: ApplicationMaster applies for and receives resources from ResourceManager through the RPC protocol in a polling manner.

Question42: Which of the following statements about atomicity in the key features of ZooKeeper is correct?

Question43: Regarding the task selection of the capacity scheduler, which statement is correct?

Question44: Which component controls the primary and secondary arbitration in HDFS?

Question45: Regarding the the configuration function of Fusioninsight Manager to service, which of the following is incorrect?

Question46: When the number of nodes in the Zookeeper cluster is 5 nodes, how many nodes are equivalent to the disaster tolerance of the cluster?

Question47: ElasticSearch's shards index fragmentation can break up the index data and distribute it to different nodes.

Question48: In the Fusioninsight Manager interface, which of the following options is not included in the operation of the loader?

Question49: Regarding the architecture description of Hive in Fusionlnsight HD, which of the following is incorrect?

Question50: Regarding the basic operation of Hive table creation, which description is correct?

Question51: In the Mapreduce process, by default, a shard is a block and a mapTask.

Question52: Redis supports multiple databases.

Question53: When Solr creates a Collection, the recommended routing algorithm is compositld Router, then the Collection can expand the shard.

Question54: In the MRS platform, which component does the Flume data flow not need to pass through in the node?

Question55: Which of the following belong to DDL (Data Definition Language) in Hive SQL? (Multiple choice)

Question56: When the Loader of MRS creates a job, what is the role of the connector?

Question57: How many copies of HDFS Block in Fusionlnsight HD system are saved by default?

Question58: What services can Huawei DWS provide to customers? (Multiple choice)

Question59: When a Region in HBase performs a Split operation, at what stage does the process of separating an HFile file into two regions occur?

Question60: 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?

Question61: The () interface in Flink is used for stream data processing, and the () interface is used for batch processing

Question62: Which of the following information is included in the Zookeeper client command? (Multiple choice)

Question63: When the Spark application is running, what is the basis for stage division?

Question64: Which of the following statements about Sparkstreaming and Streaming are wrong?

Question65: Which application scenarios is HBase not suitable for?

Question66: In the HDFS copy placement strategy, what is the distance between different servers in the same rack?

Question67: Through observation, it can be concluded that the final T3 calculation result is?

Question68: Each stage of a Spark task can be divided into job, and the division mark is shuffle.

Question69: The topology will automatically end running after the task is completed.

Question70: In what scenarios is the MapReduce component of Hadoop good at handling computing tasks?

Question71: In a Huawei Fusioninsight HD cluster, which of the following services can the Spark service read data from? (Multiple choice)

Question72: Which of the following RESTful request methods belong to ElasticSearch? (Multiple choice)

Question73: Regarding RDD, which of the following statements is wrong?

Question74: Spark is implemented in which of the following programming languages?

Question75: What is the meaning of this command "ALTER TABLEemployee1ADDcolumns (columnlstring);" in Hive?

Question76: The ResourceManager adopts a high-availability solution. When the Active resourcemanager finds a fault, it can only start the standby resourcemanager through the built-in zookeeper and switch its state to active.

Question77: When the Fusioninsight Manager interface shows that the Hive service status is Bad, what are the possible reasons? (Multiple choice)

Question78: Fusioninsight HD system audit log is unavailable to record which of the following operations?

Question79: HiveServer compiles and parses the HQL statements submitted by the user into corresponding Yarn tasks, Spark tasks or HDPS operations, thereby completing data extraction, conversion, and analysis.

Question80: In the Fusionlnsight Hadoop cluster, the cluster scale has 70 nodes. If the recommended deployment plan is adopted, what partitions might exist on the management node? (Multiple choice)

Question81: A user needs to build a 350-node Fusionlnsight HD cluster. Which planning solution is the best?

Question82: Which configuration is not supported by Fusioninsight Manager user rights management?

Question83: In Spark on YARN mode, nodes without NodeManager deployed cannot start executor to execute tasks.

Question84: Assuming that the data volume is about 200GB and the maximum fragment capacity is limited to 30GB, what is the appropriate design for the maximum number of fragments?

Question85: Flume is used to collect data, and the basic unit of data transmitted by the device is?

Question86: In creating a Loader job, which of the following steps can be used to set the filter type?

Question87: Fusioninsight Manger externally supports REST interface, SNMP interface, and SYSLOG interface.

Question88: In order to improve the fault tolerance of kafka, kafka supports partition replication strategy. What is wrong with the following description of Leader partition and Follower partition?

Question89: If you want to add 1 to the digital value stored in the Key, which command should be used?

Question90: The enhanced features of Zookeeper include adding the audit log of the deleted ephemeral node to the audit log.

Question91: When deploying HBase in a Fusioninsight HD cluster with N nodes, it is recommended to deploy __ HMaster processes and __ RegionServer processes.

Question92: Regarding the task selection of the capacity scheduler, which of the following statements is correct? (Multiple choice)

Question93: All nodes of ZooKeeper can handle read requests.

Question94: Which command in Redis is to view the remaining lifetime of the key?

Question95: Kerberos, as an authentication server center, can provide unified authentication services to all services in the cluster and secondary development applications of customers.

Question96: MOB data in HBase is directly stored in HFile format on HDFS, and then the address information and size information of this file are stored as value on the store that manages HBase, and these files are managed centrally through tools. This can greatly reduce HBase's compression and split frequency and improve performance.

Question97: Compared with MapReduce computing, Spark uses ____ resources to obtain ____ times the performance?

Question98: What are the main features of YARN capacity scheduler? (Multiple choice)

Question99: Spark, like Hadoop, is not suitable for iterative computing.

Question100: Which of the following belongs to the features of Streaming? (Multiple choice)

Question101: According to how the data stream transfers data between two Transformations, what types of data streams can be divided into? (Multiple choice)

Question102: During the operation of the Kafka cluster, which components are directly dependent on?

Question103: When the Spark application is running, if a task fails to run, the entire app fails to run.

Question104: Fusioninsight Spark SQL, like the community Spark JDBCServer, only supports single tenant binding to a YARN resource queue multi-tenant, and does not support multi-tenant parallel execution.

Question105: Regarding the basic operation of Hive table building, which of the descriptions is correct?

Question106: In the Huawei big data solution, which of the following components are included in the hadoop layer? (Multiple choice)

Question107: In Fusioninsight HD, which of the following does not belong to the flow control feature of Hive? (Multiple choice)

Question108: The Fusionlnsight HD management node provides a dual-machine HA mechanism. After the primary node fails, the primary and standby nodes need to manually implement Failover.

Question109: What items can Fusionlnsight Manager perform health checks on? (Multiple choice)

Question110: The overall process of Kafka Producer 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 to the corresponding Broker to publish the data.

Question111: Channel supports transactions, provides weaker sequence guarantees, and can connect any number of Sources and Sinks.

Question112: Which of the following functions can Spark provide? (Multiple choice)

Question113: Spark is a memory-based computing engine. All data during the running of Spark programs can only be stored in memory.

Question114: In the HBase component, the data read and write service needs to be connected to the Master for execution.

Question115: When Flume processes are cascaded, which of the following sink types are used to receive messages sent by the last hop Flume? (Multiple choice)

Question116: When Fusioninsight Manager connects with external platforms, which interfaces does it support? (Multiple choice)

Question117: After the Loader job in Fusioninsight HD is submitted to YARN, the job cannot be stopped manually.

Question118: The Fusioninsight HD cluster planned by a bank has 90 nodes. If 3 control nodes are planned, how many data nodes in the cluster is recommended to plan?

Question119: The description about HBase's Region Split process, which is wrong?

Question120: Loader only supports the data import guide between relational database and HBase.

Question121: The role of Channel is similar to a queue, which is used to temporarily buffer incoming data. When Sink successfully sends the data to the next-hop Channel or the final destination, the data will be removed from the Channel.

Question122: Huawei has extensive experience in big data solutions in finance, public security, railways, government affairs and other industries.

Question123: In Fusionlnsight HD cluster planning, what kind of scenario is suitable for the integrated deployment of management node & control node & data node?

Question124: Which of the following sub-products does the Fusioninsight family include? (Multiple choice)

Question125: What is the physical storage unit of Region in HBase?

Question126: 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)

Question127: During the deployment of FusioninsightHD , the CheckNode. Config configuration file must be called when performing precheck to check each node.

Question128: In the Fusininsight HD platform, which components support the list encryption? (Multiple choice)

Question129: Hive does not check whether the data conforms to the schema when it is loaded. Hive follows the schema on read (read mode). Hive only checks and parses specific data fields and schemas when it is read.

Question130: Which components in the Fusioninsight HD platform support table and column encryption? (Multiple choice)

Question131: In Fusionlnsight HD, which of the following components do Flink mainly interact with? (Multiple choice)

Question132: When using the configuration planning tool to plan the Fusioninsight HD V100R002C50 cluster, you can use the V100R2002C60 configuration planning tool to plan.

Question133: Redis uses the exist command to determine whether a key exists.

Question134: Which of the following statements about Zookeeper's Leader election is correct? (Multiple choice)

Question135: 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.

Question136: The driver in Spark on YARN mode can only run on the client.

Question137: Which of the following statement about ZKFC is incorrect?

Question138: Which parts of the data need to be read to perform the HBase data reading service? (Multiple choice)

Question139: When the loader in Fusioninsight HD imports files from the SFTP server, which of the following is the fastest file type without encoding conversion and data conversion?

Question140: Which of the following descriptions of HBase FileStream (HFS) are correct? (Multiple choice)

Question141: Hive does not support a timeout retry mechanism.

Question142: Loader job execution fails, the imported data will not be deleted automatically, and must be deleted manually.

Question143: 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)

Question144: Which of the following aspects reflect Fusioninsight HD data high reliability? (Multiple choice)

Question145: ElasticSearch is strongly dependent on Zookeeper.

Question146: Which of the following are important roles of Spark? (Multiple choice)

Question147: Which of the following optimization methods belong to Redis? (Multiple choice)

Question148: Which way does ElasticSearch index data use?

Question149: Which of the following HDFS commands can be used to check the integrity of data blocks?

Question150: In the Fusioninsight cluster networking design, the Layer 2 networking refers to the Layer 2 switching in the cluster. The cluster nodes are in a subnet, which is suitable for cluster scenarios with nodes less than 200.

Question151: Which of the following statements about CarbonData in Fusioninsight are correct? (Multiple choice)

Question152: Which process does the Map stage describe?

Question153: Which of the following descriptions of the cloud search service CSS is correct? (Multiple choice)

Question154: Hardware failure is considered normal. In order to solve this problem, HDFS has designed a copy mechanism.
By default, one file, how many copies will HDFS save?

Question155: What is the purpose of the HBase cluster to perform compaction regularly? (Multiple choice)

Question156: When deploying Fusioninsight HD, how many FlumeServer nodes in the same cluster are recommended to deploy at least?

Question157: Kafka is a distributed message publishing and subscribing system. It only forwards messages and does not save messages.

Question158: Which of the following descriptions of Hive features are incorrect?

Question159: Flink has no restart strategy.

Question160: Regarding the Kafka, which is wrong?

Question161: 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.

Question162: A KeyValue format in the HBase data file HFile contains Key, Value, TimeStamp, KeyType, etc.

Question163: 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 seriously affects performance.

Question164: Which nodes are required to communicate with external data sources before and after Fusioninsight HD Loader job?

Question165: Spark Streaming has higher real-time performance than Storm.

Question166: In Hive, which of the following description of the partition is wrong?

Question167: Which of the following options cannot be achieved through big data technology?

Question168: Which of the following nodes in HDFS is ZKFC process deployed on? (Multiple choice)

Question169: What data does Fusioninsight Manager back up regularly? (Multiple choice)

Question170: What services can Huawei MRS provide to customers? (Multiple choice)

Question171: What are the performance bottlenecks of traditional data processing? (Multiple choice)

Question172: YThe main difference between YARN-client and YARN-cluster is the difference in the Application Master process.

Question173: Does the underlying data of HBase exist in the form of _____?

Question174: All Zookeeper nodes can handle requests

Question175: Which of the following options are the advantages of Fusioninsight SparkSQL?