What is Your Cluster size ?
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How to configure hadoop to reuse JVM for mappers?
What is crontab? Explain with suitable example?
What are combiners and its purpose?
What is oozie in hadoop?
How does an hadoop application look like or their basic components?
What is the use of combiners in the hadoop framework?
Explain InputFormat?
What is compute and Storage nodes?
What is the difference between traditional RDBMS and Hadoop?
What if rack 2 and datanode fails?
Is hadoop a memory?
What is your favourite tool in the hadoop ecosystem?