How many job tracker processes can run on a single Hadoop cluster?
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What are the side data distribution techniques?
What is the default replication factor and how will you change it?
Explain the usage of Context Object?
What happen if number of reducer is set to 0 in Hadoop?
Explain how can you debug hadoop code?
Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?
Compare Hadoop and RDBMS?
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Define data cleansing?
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