Explain the process of spilling in MapReduce?
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What are the data components used by Hadoop?
What is a RecordReader in Hadoop MapReduce?
What is the core of the job in MapReduce framework?
Explain what is “map” and what is "reducer" in hadoop?
What is identity mapper and chain mapper?
How does MapReduce framework view its input internally?
What is sqoop in Hadoop ?
What are the various configuration parameters required to run a mapreduce job?
What is the key- value pair in MapReduce?
How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.
How to configure the number of the Combiner in MapReduce?
What is the difference between Hadoop and RDBMS?