Is hadoop based on google mapreduce?
How does NameNode tackle DataNode failures?
Explain InputFormat?
Is map like a pointer?
How indexing is done in HDFS?
Explain why the name ‘hadoop’?
What are channel selectors?
What is Schema on Read and Schema on Write?
What do masters consist of?
How to come out of the insert mode?
What are the functionalities of jobtracker?
What is the meaning of speculative execution in Hadoop? Why is it important?
Define fault tolerance?