What is a checkpoint?
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Where do you specify the Mapper Implementation?
In which location Name Node stores its Metadata and why?
What is NoSQL?
Define a namenode?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
What does /var/hadoop/pids do?
Define fault tolerance?
Define a task tracker?
What exactly is hadoop?
What is the meaning of speculative execution in Hadoop? Why is it important?
What should be the ideal replication factor in Hadoop Cluster?
Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?
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Hadoop General (407)