Apache Hadoop Interview Questions
Un-Answered Questions { Apache Hadoop }
What is the purpose of dfsadmin tool?
what is a datanode?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
Whats is distributed cache in hadoop?
Is hadoop a memory?
What if rack 2 and datanode fails?
Is hadoop the future?
Input Split & Record Reader and what they do?
What is HDFS ? How it is different from traditional file systems?
What happens to a namenode, when job tracker is down?
How can we check whether namenode is working or not?
How to change from su to cloudera?
How many instances of tasktracker run on a hadoop cluster?
explain Metadata in Namenode?
Is hadoop required for data science?
