How can you set an arbitrary number of mappers to be created for a job in Hadoop?
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Give examples of some companies that are using Hadoop structure?
Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?
Can you explain record reader?
How Hadoop’s CLASSPATH plays a vital role in starting or stopping in Hadoop daemons?
Can you explain commodity hardware?
What are the actions followed by hadoop?
What is tasktracker in hadoop?
Explain what is hadoop?
What is partitioning?
Which are the three modes in which hadoop can be run?
Is it possible to have hadoop job output in multiple directories?
Give me the examples of Columnar database ?
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