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Hadoop Interview Questions
Questions Answers Views Company eMail

How to optimize MapReduce Job?

696

In MapReduce how to change the name of the output file from part-r-00000?

672

In MapReduce Data Flow, when Combiner is called?

718

Differentiate Reducer and Combiner in Hadoop MapReduce?

728

What is the key- value pair in MapReduce?

843

A number of combiners can be changed or not in MapReduce?

706

How to write a custom partitioner for a Hadoop MapReduce job?

696

What is the need of MapReduce in Hadoop?

683

What does a 'MapReduce Partitioner' do?

735

What is the difference between Reducer and Combiner in Hadoop MapReduce?

730

What is Data Locality in Hadoop?

719

What is KeyValueTextInputFormat in Hadoop MapReduce?

857

What is Mapper in Hadoop MapReduce?

786

How to set mappers and reducers for MapReduce jobs?

679

How to sort intermediate output based on values in MapReduce?

695


Un-Answered Questions { Hadoop }

Why do we use Hadoop?

964


Does spark use tez?

312


What is pig latin statements?

549


What is the Virtual Node in Cassandra ?

92


What is a broker?

554


Elaborate kafka architecture?

561


What counter in Hadoop MapReduce?

698


What are the various input and output types supported by mapreduce?

684


Explain HCatWriter?

5


Why is jconsole used?

102


How can you overwrite the replication factors in HDFS?

1285


What are active and passive "NameNodes"?

1512


What is replication in kafka?

542


Why there is need of pig language?

621


How to delete the table with the HBase shell?

153