What is Apache Hadoop? Why is Hadoop essential for every Big Data application?
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More Apache Hadoop Interview Questions
Name some companies that use Hadoop?
Define a datanode?
Does hadoop always require digital data to process?
What is the use of combiners in the hadoop framework?
What is HDFS High Availability?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
What is the difference between Apache Hadoop and RDBMS?
Explain what is sqoop in Hadoop ?
Is client the end user in HDFS?
How to write a Custom Key Class?
What are sink processors?
How is hadoop different from other data processing tools?
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