How do you define "block" in HDFS?


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More Apache Hadoop Interview Questions

What Mapper does?

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What is the difference between Hadoop and Traditional RDBMS?

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What are active and passive "NameNodes"?

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What is a block and block scanner in HDFS?

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Explain the use of tasktracker in the hadoop cluster?

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How does an hadoop application look like or their basic components?

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Explain the hadoop-core configuration?

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What if a namenode has no data?

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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?

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shouldn't DFS be able to handle large volumes of data already?

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What is rack-aware replica placement policy?

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Does this lead to security issues?

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