Is hadoop open source?

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More Apache Hadoop Interview Questions

Explain the basic difference between traditional rdbms and hadoop?

Does the hdfs client decide the input split or namenode?

How can you overwrite the replication factors in HDFS?

Is client the end user in HDFS?

Define a datanode?

Can you explain how do ‘map’ and ‘reduce’ work?

What is HDFS block size and what did you chose in your project?

Explain how is hadoop different from other data processing tools?

Have you ever used Counters in Hadoop. Give us an example scenario?

Mention what are the data components used by Hadoop?

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what is meaning Replication factor?

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