What is configured in /etc/hosts and what is its role in setting Hadoop cluster?
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How ordering in hdfs is finished?
What does rack awareness algorithm means and why is it utilized as a part of hadoop?
What is the job tracker role in hadoop?
Can you explain speculative execution?
What are the side data distribution techniques?
What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?
What is a Heartbeat in Hadoop?
How can one check whether NameNode is working or not?
What happen if a datanode loses network connection for a few minutes?
Can you define inputsplit in hadoop?
What is data cleansing?
What is the default replication factor and how will you change it?
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