How does NameNode tackle DataNode failures?
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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 are the functionalities of jobtracker?
Which files are used by the startup and shutdown commands?
What is the relation between job and task in hadoop?
What is salary of hadoop developer?
What is a speculative execution in Apache Hadoop MapReduce?
What is yarn in hadoop?
What is HDFS ? How it is different from traditional file systems?
Does this lead to security issues?
What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?
Explain the difference between gen1 and gen2 hadoop with regards to the namenode?
What is Row Key?
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