What is Mapper in Hadoop MapReduce?
What are the identity mapper and reducer in MapReduce?
What comes in Hadoop 2.0 and MapReduce V2 YARN
Explain what combiners are and when you should use a combiner in a mapreduce job?
what is Speculative Execution?
Explain what is distributed cache in mapreduce framework?
What do you understand by the term Straggler ?
Explain the input type/format in mapreduce by default?
Write a short note on the disadvantages of mapreduce
If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?
What is a MapReduce Combiner?
Why is Apache Spark faster than Hadoop MapReduce?
Explain about the partitioning, shuffle and sort phase in MapReduce?