What is the meaning of speculative execution in Hadoop? Why is it important?
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What happens in a textinputformat?
What is partioner in hadoop? Where does it run,mapper or reducer?
What is Writable & WritableComparable interface?
How does NameNode tackle DataNode failures?
How to use Apache Zookeeper command line interface?
What is hbase in hadoop?
How is the option in Hadoop to skip the bad records?
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Explain how input and output data format of the hadoop framework?
Explain a simple Map/Reduce problem.
What is the difference between hadoop and other data processing tools?
What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?
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