Define a job tracker?
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What is Partioner in hadoop? Where does it run
What is the relation between job and task in hadoop?
Why password is needed in ssh localhost?
Define a datanode?
what are the steps involved in commissioning adding
How the Client communicates with HDFS?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
Explain the basic difference between traditional rdbms and hadoop?
What is the use of Combiner?
How Mapper is instantiated in a running job?
What is a 'block' in HDFS?
What is Apache Hadoop? Why is Hadoop essential for every Big Data application?
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