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What do you understand by a closure in scala?
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What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?
What is the difference between namenode and datanode in hadoop?
What do you understand by a closure in scala?
What is the most widely recognized info formats characterized in hadoop?
Why we use intwritable instead of int? Why we use longwritable instead of long?
what if job tracker machine is down?
Define “speculative execution” in hadoop?
What is the use of context object?
What are input format, input split & record reader and what they do?
List Hadoop’s three configuration files?
What happen if number of reducer is set to 0 in Hadoop?
List some use cases where classification machine learning algorithms can be used.
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