What are the various InputFormats in Hadoop?
Where is Mapper output stored?
Is reduce-only job possible in Hadoop MapReduce?
Why MapReduce uses the key-value pair to process the data?
Explain what does the conf.setMapper Class do in MapReduce?
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
How does Mappers run method works?
What is Data Locality in Hadoop?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
What is Text Input Format?
Explain the features of Apache Spark because of which it is superior to Apache MapReduce?
How do Hadoop MapReduce works?
What are the identity mapper and reducer in MapReduce?