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What is Schema on Read and Schema on Write?


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More Apache Hadoop Interview Questions

What is output format in hadoop?

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How many instances of tasktracker run on a hadoop cluster?

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How hdfa differs with nfs?

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Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?

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What is the difference between rdbms and hadoop?

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Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?

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what are the steps involved in commissioning adding

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Does the hdfs client decide the input split or namenode?

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Explain what if rack 2 and datanode fails?

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How the HDFS Blocks are replicated?

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What is the process to change the files at arbitrary locations in HDFS?

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What is Derby database?

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