Mention what are the data components used by Hadoop?
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What alternate way does HDFS provides to recover data in case a Namenode
What is HDFS Block size? How is it different from traditional file system block size?
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?
Can Hadoop be compared to NOSQL database like Cassandra?
How many instances of JobTracker can run on a Hadoop Cluser?
How can we check whether namenode is working or not?
What is unstructured data?
How to enable trash/recycle bin in hadoop?
What is hadoop framework?
Explain why the name ‘hadoop’?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
Explain Erasure Coding in Apache Hadoop?
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