Explain the hadoop-core configuration?
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Explain how can we change the split size if our commodity hardware has less storage space?
How can you overwrite the replication factors in HDFS?
Explain what happens in textinformat ?
What are active and passive "NameNodes"?
What is the jobtracker and what it performs in a hadoop cluster?
What is the purpose of DataNode block scanner?
Mention what is the use of Context Object?
How to restart Namenode?
How does NameNode tackle DataNode failures?
What is MapFile?
Where is the Mapper Output intermediate kay-value data stored ?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
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