Define a job tracker?
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What are the most commonly defined input formats in Hadoop?
Explain Erasure Coding in Apache Hadoop?
Which are the three main hdfs-site.xml properties?
Can we do online transactions(oltp) using hadoop?
What stored in HDFS?
Can you explain how do ‘map’ and ‘reduce’ work?
What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?
What do you understand from Node redundancy and is it exist in hadoop cluster?
What Mapper does?
How many instances of tasktracker run on a hadoop cluster?
What is oozie in hadoop?
How we can change Replication factor when Data is on the fly?