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

• A.The blocks stored by different DataNodes must be different
• B.Blocks on a DataNode can be the same
• C.Will not check the validity of the data
• D.Periodically send the block related information of this node to the NameNode

Comment: *

Name: *

Email: *

Verification: *

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

• A.Redis
• B.kafka
• C.ElasticSearch
• D.HDFS

Comment: *

Name: *

Email: *

Verification: *

If part of the information is allowed to be lost in the process of message processing, which of the following methods can be used to close the message reliability processing mechanism? (Multiple choice)

• A.Use Unanchor to send messages when Bolt sends messages
• B.When Spout sends a message, use the interface that does not specify the message ID of the message to send
• C.Set the reference Config.Topology_ACKKRS to False
• D.Set the parameter Config.Topology_ACKKRS to 0

Comment: *

Name: *

Email: *

Verification: *

A typical Katka cluster contains several Producers, several Brokers, several Consumers and a ZooKeeper cluster.

• A.False
• B.True

Comment: *

Name: *

Email: *

Verification: *

The following customson Hivev basicoperatecommandexplainThe correct one?

• A.rodovetab1e T1where id=, //deleteEligible in the table"id=1" ofdata.
• B.create table if not exists T1 1ikeT2.//copyT2 table, including the data in the table, and named T1
• C.alter table T1 rerame to T2:/Rename table T1 to T2
• D.firop tab1 e if exists T1.//deletesurfaceT1

Comment: *

Name: *

Email: *

Verification: *