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What are the core components of Apache Hadoop?


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More Apache Hadoop Interview Questions

What is a namenode? How many instances of namenode run on a hadoop cluster?

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Explain the overview of hadoop history breifly?

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What is a task instance in hadoop? Where does it run?

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Why are the number of splits equal to the number of maps?

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What is Writable & WritableComparable interface?

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Explain what is sqoop in Hadoop ?

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Which files are used by the startup and shutdown commands?

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What are the functions of NameNode?

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How to enable recycle bin or trash in hadoop?

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What do shuffling do?

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What is the meaning of the term "non-DFS used" in Hadoop web-console?

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when hadoop enter in safe mode?

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