What is the functionality of jobtracker in hadoop?
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How can I restart namenode?
Which is the best hadoop certification?
What will you do when NameNode is down?
How Mapper is instantiated in a running job?
Define a combiner?
What is the use of combiners in the hadoop framework?
What is HDFS Federation?
How will format the HDFS ?
What is the problem with small files in Apache Hadoop?
Mention what is the number of default partitioner in Hadoop?
Explain the core components of hadoop?
What is the relation between job and task in hadoop?
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