Question

To import data to Hadoop cluster from relational database sqoop create a mapreduce job. In this job

A - All the data is transferred in one go.

B - each mapper transfers a slice of Table's data

C - Each mapper transfers tables' data along with table's metadata (name of the columns etc)

D - Only the schema of relational table is validated without fetching data

Answer 1

Answer is

B - each mapper transfers a slice of Table's data