did you maintain the hadoop cluster in-house or used hadoop in the cloud?
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Define a datanode?
How to Administering Hadoop?
Is hadoop obsolete?
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?
How blocks are distributed among all data nodes for a particular chunk of data?
Which one is default InputFormat in Hadoop ?
What do sorting do?
What is difference between regular file system and HDFS?
What do slaves consist of?
What is Rack Awareness in Apache Hadoop?
What is zookeeper in hadoop?
what factors the block size takes before creation?
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