What is the procedure for namenode recovery?
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Why aggregation cannot be done in Mapper?
What is the role of the secondary namenode?
What are the most common InputFormats in Hadoop?
What is Distributed Cache in Hadoop?
Where are hadoop’s configuration files located and list them?
Explain the common input formats in hadoop?
Can we deploy job tracker other than name node?
Mention what is distributed cache in hadoop?
Which are the three modes in which hadoop can be run?
What are the hadoop configuration files at present?
How often DataNode send heartbeat to NameNode in Hadoop?
What is High Availability feature in Hadoop2?
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