Which command is used for the retrieval of the status of daemons running the hadoop cluster?
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What is the main purpose of HDFS fsck command?
What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?
What alternate way does HDFS provides to recover data in case a Namenode
What is unstructured data?
What is inputsplit in hadoop? Explain.
How to configure hadoop to reuse JVM for mappers?
Explain how is hadoop different from other data processing tools?
What is inputformat in hadoop?
Can we do online transactions(oltp) using hadoop?
What are the benefits of block transfer?
What is Writable & WritableComparable interface?
How the Client communicates with HDFS?