Define data cleansing?
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what happens when namenode goes down during file read operation in hadoop?
Which are the three modes in which hadoop can be run?
What are the important features of hadoop?
Mention what is data cleansing?
What is the purpose of context object?
Explain map-only job?
What are the main components of hadoop?
Explain what is speculative execution?
Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?
Is hadoop still in demand?
Can you explain combiner?
List of the some best tools that can be useful for data-analysis?
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