Comparison between Secondary NameNode and Checkpoint Node in Hadoop?
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What is KeyValueTextInputFormat in Hadoop?
Define a record reader?
What are some typical functions of job tracker in hadoop?
What is the difference between an inputsplit and a block?
We have already sql then why nosql?
How is security achieved in Hadoop?
How jobtracker assign tasks to the tasktracker?
What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?
What is Combiner in Hadoop?
What is the use of cloudera?
Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?
What is hadoop? Name the main components of a hadoop application?
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