What is the jobtracker and what it performs in a hadoop cluster?
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What is compute and Storage nodes?
What is Hadoop Custom partitioner ?
What is the difference between HDFS and NAS ?
what factors the block size takes before creation?
Which one is default InputFormat in Hadoop ?
Explain how do ‘map’ and ‘reduce’ works?
Define a datanode?
Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?
What do you know about nlineoutputformat?
Define streaming access?
Explain Erasure Coding in Apache Hadoop?
What are the main components of a Hadoop Application?
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