Can hadoop replace relational database?
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What do you know about yarn?
What happen on the namenode when a client tries to read a data file?
Explain about Hadoop file system and processing framework?
How to do ‘map’ and ‘reduce’ works?
What are input format, input split & record reader and what they do?
What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?
Mention what are the three modes in which hadoop can be run?
How NameNode tackle Datanode failures in Hadoop?
Can hadoop replace relational database?
Can you explain rack awareness?
Name the most common input formats defined in hadoop?
Explain what happens in text format?
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