Where do you specify the Mapper Implementation?


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More Apache Hadoop Interview Questions

What exactly is hadoop?

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What is DistributedCache and its purpose?

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what is the typical block size of an HDFS block?

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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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How to write a Custom Key Class?

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What is HDFS ? How it is different from traditional file systems?

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What is the best hardware configuration to run Hadoop?

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What is NoSQL?

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Can hbase run without hadoop?

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What are the site-specific configuration files in Hadoop?

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What is compute and Storage nodes?

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Explain the use of tasktracker in the hadoop cluster?

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