Explain a simple Map/Reduce problem.
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Explain the overview of hadoop history breifly?
What is the difference between Apache Hadoop and RDBMS?
Can we call vms as pseudos?
What are the site-specific configuration files in Hadoop?
What is MapFile?
What is a Combiner?
What is the difference between HDFS and NAS ?
What is the meaning of speculative execution in Hadoop? Why is it important?
What are active and passive "NameNodes"?
How does NameNode tackle DataNode failures?
Where is the Mapper Output intermediate kay-value data stored ?
Did you ever ran into a lop sided job that resulted in out of memory error
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