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.

901

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

729

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?

766

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

724

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

529

Difference between mapreduce and spark

744

Name job control options specified by mapreduce.

760

How does inputsplit in mapreduce determines the record boundaries correctly?

693

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

728

What main configuration parameters are specified in mapreduce?

723

Is it necessary to write a mapreduce job in java?

671

What is shuffling and sorting in mapreduce?

697

What is the function of mapreducer partitioner?

684

Is there any point of learning mapreduce, then?

699

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

792