What is a “Distributed Cache” in Apache Hadoop?
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What are active and passive "NameNodes"?
Explain what is sqoop in Hadoop ?
How many instances of JobTracker can run on a Hadoop Cluser?
What infrastructure do we need to process 100 TB data using Hadoop?
What is a block and block scanner in HDFS?
What do you know about keyvaluetextinputformat?
What is salary of hadoop developer?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
What happens in a textinputformat?
Where is the Mapper Output intermediate kay-value data stored ?
How is HDFS fault tolerant?
Explain what if rack 2 and datanode fails?