What are the benefits yarn brings in to hadoop?
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what if job tracker machine is down?
Why use hadoop?
What is configured in /etc/hosts and what is its role in setting Hadoop cluster?
Can you define udf?
How to restart NameNode or all the daemons in Hadoop?
How to do ‘map’ and ‘reduce’ works?
What are the features of Pseudo mode?
What does the mapred.job.tracker command do?
How often do you need to reformat the namenode?
What are the most common OutputFormat in Hadoop?
What is the relationship between Jobs and Tasks in Hadoop?
Can we use windows for hadoop?
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