Explain the usage of Context Object?
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Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?
Is it possible to provide multiple input to Hadoop? If yes then how?
Why slaves limited to 4000 in hadoop version 1?
Why aggregation cannot be done in Mapper?
How many datanodes can run on a single Hadoop cluster?
What is the purpose of RecordReader in hadoop?
Where are hadoop’s configuration files located and list them?
Where are Hadoop’s configuration files located?
List some use cases where classification machine learning algorithms can be used.
Are there any special requirements for namenode?
What is a Backup node in Hadoop?
How can we create a hadoop cluster from scratch?
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