MapReduce Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Topic :: MapReduce

MapReduce Interview Questions

Questions Answers Views Company eMail

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.

891

Describe what happens to a mapreduce job from submission to output?

718

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?

756

What are mapreduce new and old apis while writing map reduce program?. Explain how it works

712

Can we write map reduce program in other than java programming language. How?

523

Difference between mapreduce and spark

732

Name job control options specified by mapreduce.

753

How does inputsplit in mapreduce determines the record boundaries correctly?

680

How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?

719

What main configuration parameters are specified in mapreduce?

717

Is it necessary to write a mapreduce job in java?

660

What is shuffling and sorting in mapreduce?

685

What is the function of mapreducer partitioner?

670

Is there any point of learning mapreduce, then?

691

If you run a select * query in hive, why does it not run mapreduce?

782