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Apache Hadoop Interview Questions
Un-Answered Questions { Apache Hadoop }
How did you debug your Hadoop code ?
Is it possible to provide multiple inputs to hadoop? If yes, explain.
Explain the core components of hadoop?
What are channel selectors?
Explain the difference between NameNode
What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?
How does NameNode tackle DataNode failures?
How is security achieved in Apache Hadoop?
What is crontab? Explain with suitable example?
Mention what is the use of Context Object?
What are the main components of a Hadoop Application?
How the HDFS Blocks are replicated?
Mention what are the data components used by Hadoop?
What is the heartbeat used for?
How can I restart namenode?
