What is the purpose of DataNode block scanner?


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More Apache Hadoop Interview Questions

How to enable recycle bin or trash in hadoop?

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What do slaves consist of?

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How you can contact your client everyday ?

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Data Engineer Given a list of followers in the format:123, 345234, 678345, 123…Where column one is the ID of the follower and column two is the ID of the followee. Find all mutual following pairs (the pair 123, 345 in the example above). How would you use Map/Reduce to solve the problem when the list does not fit in memory?

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Can hbase run without hadoop?

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What Mapper does?

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How to keep HDFS cluster balanced?

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

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How we can change Replication factor when Data is on the fly?

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Can you tell us more about ssh?

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What is the function of ApplicationMaster?

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What is hadoop framework?

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