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What is the purpose of RecordReader in hadoop?
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What are input format, input split & record reader and what they do?
If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?
What are the port numbers of namenode?
Mention how hadoop is different from other data processing tools?
How NameNode tackle Datanode failures in Hadoop?
Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?
What is purpose of RecordWriter in Hadoop?
Can you give some examples of Big Data?
What is the difference between an inputsplit and a block?
What is the use of context object?
While starting hadoop services, datanode service is not running?
When should be hadoop archive create?
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