What is the functionality of jobtracker in hadoop?
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Explain InputFormat?
Explain how do ‘map’ and ‘reduce’ works?
What is the difference between traditional RDBMS and Hadoop?
What is version-id mismatch error in hadoop?
How many maximum jvm can run on a slave node?
What is zookeeper in hadoop?
What is the difference between Apache Hadoop and RDBMS?
what is the typical block size of an HDFS block?
How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?
What hadoop does in safe mode?
What is HDFS High Availability?
Is hadoop a database?