What is DistributedCache and its purpose?
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In which location Name Node stores its Metadata and why?
shouldn't DFS be able to handle large volumes of data already?
What are the basic available commands in Hadoop sqoop ?
On what basis Namenode will decide which datanode to write on?
How we can take Hadoop out of Safe Mode?
What is unstructured data?
What do the master class and the output class do?
What is yarn in hadoop?
What is the sequencefileinputformat in hadoop?
What are the additional benefits YARN brings in to Hadoop?
What is HDFS Block size? How is it different from traditional file system block size?
Can we do online transactions(oltp) using hadoop?