Main Components of Hadoop?
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what is the default replication factor in HDFS?
Which is the best hadoop certification?
Does google use hadoop?
What is IdentityMapper?
Can you explain how do ‘map’ and ‘reduce’ work?
Is hadoop obsolete?
What is Safemode in Apache Hadoop?
What is HDFS Federation?
What do you know about nlineoutputformat?
What is Input Split in hadoop?
Mention what is the use of Context Object?
What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?