Explain the hadoop configuration files at present?
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Explain why the name ‘hadoop’?
Explain how do ‘map’ and ‘reduce’ works?
What Mapper does?
What is Rack Awareness in Apache Hadoop?
Explain the use of tasktracker in the hadoop cluster?
What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?
What is Schema on Read and Schema on Write?
How to resolve IOException: Cannot create directory
Can Apache Kafka be used without Zookeeper?
How to enable recycle bin in hadoop?
What are the functions of NameNode?
What is the function of NodeManager?