What is the use of combiner?

Combine Mapper output Separate Reducer output Separate Mapper input Separate Mapper output

Which tool can be used for Web Graphical User interface of Hbase?

Hue Ambari Cloudera Manager Beeswax

What is the use of partitioner?

Separate Reducer output Separate Mapper output Separate Mapper input Default mapper

Which ecosystem project is ideal for use when we have multiple mapreduce and pig programs to run in a sequence

Oozie Hive Pig Sqoop

What is called pipelining in Hadoop?

Datanode Namenode Jobtracker Tasktracker