Is secondary namenode a substitute to the namenode?
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What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
Who is a 'user' in HDFS?
Explain how input and output data format of the hadoop framework?
Explain how is hadoop different from other data processing tools?
What are different hdfs dfs shell commands to perform copy operation?
What are the two main parts of the hadoop framework?
What is the default replication factor?
How hdfa differs with nfs?
What is the difference between rdbms and hadoop?
Explain InputFormat?
How is security achieved in Apache Hadoop?
What is the full form of fsck?