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More Apache Hadoop Interview Questions

What is a Task instance in Hadoop? Where does it run?1

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

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What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?

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What are the four characteristics of Big Data?

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Is a job split into maps?

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What is a spill factor with respect to the ram?

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What is Hadoop?

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How Mapper is instantiated in a running job?

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What is crontab? Explain with suitable example?

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What are the additional benefits YARN brings in to Hadoop?

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What is the difference between a Hadoop and Relational Database and Nosql?

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How is the distance between two nodes defined in Hadoop?

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