What are the different types of Znodes?
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What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
What are the two main components of ResourceManager?
What is the communication channel between client and namenode/datanode?
Mention what are the data components used by Hadoop?
What is Safemode in Apache Hadoop?
what is a datanode?
What is the problem with HDFS and streaming data like logs
What is structured data?
What is difference between regular file system and HDFS?
Explain how do ‘map’ and ‘reduce’ works?
What do shuffling do?
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