What is a block and block scanner in HDFS?


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More Apache Hadoop Interview Questions

Why do we need a password-less ssh in fully distributed environment?

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how can we change Replication Factor?

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Mention what is the number of default partitioner in Hadoop?

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What is small file problem in hadoop?

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How do you categorize a big data?

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What is the problem with small files in Apache Hadoop?

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What is the full form of fsck?

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What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?

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Explain the difference between NameNode

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Explain Erasure Coding in Apache Hadoop?

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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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Command to format the NameNode?

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