Why the name ‘hadoop’?
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how to share the metastore within multiple users?
What is difference between regular file system and HDFS?
How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?
What are the problems with Hadoop 1.0?
How would you tackle counting words in several text documents?
Input Split & Record Reader and what they do?
What is a task instance in hadoop? Where does it run?
when hadoop enter in safe mode?
Explain a simple Map/Reduce problem.
Data Engineer Given a list of followers in the format:123, 345234, 678345, 123…Where column one is the ID of the follower and column two is the ID of the followee. Find all mutual following pairs (the pair 123, 345 in the example above). How would you use Map/Reduce to solve the problem when the list does not fit in memory?
What is DistributedCache and its purpose?
What is Apache Hadoop YARN?
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