How many instances of JobTracker can run on a Hadoop Cluser?
How can we control particular key should go in a specific reducer?
What do you understand about Object Oriented Programming (OOP)? Use Java examples.
What are the main differences between versions 1.5 and version 1.6 of Java?
Describe what happens to a MapReduce job from submission to output?
What mechanism does Hadoop framework provides to synchronize changes made in Distribution Cache during runtime of the application
Did you ever built a production process in Hadoop ? If yes then what was the process when your hadoop job fails due to any reason
Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it
What is HDFS ? How it is different from traditional file systems?
What is the benifit of Distributed cache, why can we just have the file in HDFS and have the application read it
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