Mention what is the number of default partitioner in Hadoop?
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What is partioner in hadoop? Where does it run,mapper or reducer?
How to write a Custom Key Class?
did you maintain the hadoop cluster in-house or used hadoop in the cloud?
when hadoop enter in safe mode?
Explain the features of stand alone (local) mode?
What is yarn in hadoop?
Is it possible to provide multiple inputs to hadoop? If yes, explain.
What stored in HDFS?
Explain the features of pseudo mode?
How to resolve small file problem in hdfs?
What problems can be addressed by using Zookeeper?
What is a task instance in hadoop? Where does it run?
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