What is a Record Reader in hadoop?
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What do you understand from Node redundancy and is it exist in hadoop cluster?
Where is the Mapper Output stored?
Does hadoop always require digital data to process?
How will you make changes to the default configuration files?
How to configure hadoop to reuse JVM for mappers?
What is HDFS High Availability?
What is the heartbeat used for?
Command to format the NameNode?
What is Apache Hadoop?
How many JVMs run on a slave node?
Does this lead to security issues?
Name some companies that use Hadoop?