A.False

B.True

A.You can specify a time period for log collection, for example, only collect logs from 2016-1-1 to 2016-1-10.

B.You can specify the node IP for log collection, for example, only download the logs of a certain IP.

C.You can specify the instance for log collection, for example, specify the log collection of metstore.

D.Specific users can be designated for log collection, for example, only logs generated by UserA can be downloaded.

A.True

B.False

A.Scattered data has problems such as noise, missing, irregular storage type, etc., which requires a lot of data preprocessing.

B.The data is scattered among various departments of the enterprise, and the same data is inconsistent in the internal storage format of each department.

C.The technological advancement of competitors.

D.The data structure is diversified.

A.Redis

B.HDFS

C.ElasticSearch

D.kafka