What is a namenode?
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What is difference between reducer and combiner?
Define data cleansing?
What sorts of actions does the job tracker process perform?
How Hadoop’s CLASSPATH plays a vital role in starting or stopping in Hadoop daemons?
What does the mapred.job.tracker command do?
Explain small file problem in hadoop
Explain Hadoop Archives?
What is meant by streaming access?
what if job tracker machine is down?
Mention what does the text input format do?
How Hadoop is cost-effective?
What is winutils hadoop?
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