Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.

617

What is the Job interface in MapReduce framework?

876

Explain the Reducer's Sort phase?

848

When is it suggested to use a combiner in a MapReduce job?

593

What combiners are and when you should utilize a combiner in a map reduce job?

573

For a Hadoop job, how will you write a custom partitioner?

621

What is identity mapper and identity reducer?

620

Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?

585

What do you mean by shuffling and sorting in MapReduce?

666

Define Writable data types in Hadoop MapReduce?

617

how Hadoop is different from other data processing tools?

620

What is the core of the job in MapReduce framework?

812

Explain what combiners are and when you should use a combiner in a mapreduce job?

583

Difference between mapreduce and spark

657

How do you stop a running job gracefully?

572