Answer / Vinesh Pratap Singh

The basics of Apache Hadoop include its architecture, which consists of a cluster of commodity hardware running the Hadoop Distributed File System (HDFS) for storage and MapReduce for processing. Other key components are YARN for resource management and HBase, Pig, Hive, and Spark for data processing.

Knox and Hadoop Development Tools?

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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?

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