Can you explain combiner?
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Compare Apache Hadoop and Apache Spark?
Can you explain combiner?
Can you define a checkpoint?
What is configured in /etc/hosts and what is its role in setting Hadoop cluster?
Which object can be used to get the progress of a particular job
What is the basic difference between traditional RDBMS and Hadoop?
What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?
Explain how jobtracker schedules a task?
what happens when namenode goes down during file read operation in hadoop?
How to create the directory when name node is in safe mode?
Name the most common Input Formats defined in Hadoop? Which one is default?
Who are ‘Data Scientists’?
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