What are combiners and its purpose?
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what is the default replication factor in HDFS?
What is the problem with small files in Apache Hadoop?
What is a “Distributed Cache” in Apache Hadoop?
What is Rack Awareness in Apache Hadoop?
Explain the core components of hadoop?
What Mapper does?
What is Apache Hadoop? Why is Hadoop essential for every Big Data application?
What are the functionalities of jobtracker?
Explain Erasure Coding in Apache Hadoop?
What is small file problem in hadoop?
Who invented hadoop?
Explain why do we need hadoop?