What is a Speculative Execution in Hadoop MapReduce?
What is the problem with the small file in Hadoop?
Explain Working of MapReduce?
what is NameNode in Hadoop?
what does the text input format do?
what is WebDAV in Hadoop?
Explain how mapreduce works.
What is shuffling in mapreduce?
Map reduce jobs take too long. What can be done to improve the performance of the cluster?
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
When Namenode is down what happens to job tracker?
Describe what happens to a mapreduce job from submission to output?
What is the Reducer used for?