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Explain what happens in textinformat ?
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shouldn't DFS be able to handle large volumes of data already?
What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?
Explain the core components of hadoop?
How do you define "block" in HDFS?
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On what basis data will be stored on a rack?
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What hadoop does in safe mode?
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Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
What is the best hardware configuration to run Hadoop?
Where is the Mapper Output intermediate kay-value data stored ?
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