The HDFS data reading process includes the following steps, please choose the correct order. (Drag title) Order: ECADB

• A.The client calls close. to close the input stream.
• B.If the end of the data block has been reached. Then close the connection with this DataNodel, and then re-find the next data block. until all data is read.
• C.The client calls the open method of the FileSystem instance to obtain the input stream corresponding to the file.
• D.The location where the data block corresponding to this file in NameNodel is obtained by calling NameNode remotely through RPC
• E.After obtaining this input stream, the client calls the read method to read the data. The input stream selects the nearest DataNode to establish a connection and read data.

Comment: *

Name: *

Email: *

Verification: *

In the Fusioninsight HD system, which component does the flume data flow not need to pass through in the node?

• A.Channel
• B.sink
• C.Source
• D.topic

Comment: *

Name: *

Email: *

Verification: *

The processing logic of the topology is in the bolt.

• A.False
• B.True

Comment: *

Name: *

Email: *

Verification: *

Which one of the following is a node of ElasticSearch?

• A.EsNode
• B.Cluster
• C.Index
• D.EsMaster

Comment: *

Name: *

Email: *

Verification: *

HMaster needs to be connected when using HBase for data reading service in Fusioninsight HD

• A.True
• B.False

Comment: *

Name: *

Email: *

Verification: *