What is the block size in Hadoop?
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When and how to create hadoop archive?
Mention what is distributed cache in hadoop?
Name the most common input formats defined in hadoop?
What is JPS? Why is it used in Hadoop?
Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?
How Hadoop is cost-effective?
What is active and passive NameNode in Hadoop?
What are the important features of hadoop?
What daemons run on master nodes?
How namenode handles data node failures?
How Hadoop’s CLASSPATH plays a vital role in starting or stopping in Hadoop daemons?
Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?
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