What are the four basic parameters of a reducer?
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What is SequenceFileInputFormat?
How to create a custom key and custom value in MapReduce Job?
What is the input type/format in MapReduce by default?
What is the difference between Job and Task in MapReduce?
Explain InputSplit in Hadoop MapReduce?
Define Writable data types in Hadoop MapReduce?
What is heartbeat in hdfs? Explain.
Is it important for Hadoop MapReduce jobs to be written in Java?
Where is Mapper output stored?
What is a scarce system resource?
How many Reducers run for a MapReduce job?
Write a short note on the disadvantages of mapreduce
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