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

MapReduce Interview Questions

Questions Answers Views Company eMail

Explain InputSplit in Hadoop MapReduce?

633

How much space will the split occupy in Mapreduce?

642

What is a RecordReader in Hadoop MapReduce?

645

What is the difference between HDFS block and input split?

854

How to write MapReduce Programs?

666

What is the difference between an RDBMS and Hadoop?

614

How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?

682

What is the data storage component used by Hadoop?

594

When is it not recommended to use MapReduce paradigm for large scale data processing?

632

What is sqoop in Hadoop ?

648

What do you understand by the term Straggler ?

645

Explain about the basic parameters of mapper and reducer function

1017

How many InputSplits is made by a Hadoop Framework?

599

What do you understand by compute and storage nodes?

652

Explain job scheduling through JobTracker

689

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Un-Answered Questions { MapReduce }

What is the process of changing the split size if there is limited storage space on Commodity Hardware?

658

What is the data storage component used by Hadoop?

594

What is Shuffling and Sorting in a MapReduce?

640

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

620

What is the difference between Hadoop and RDBMS?

597

what does the text input format do?

781

How many Reducers run for a MapReduce job in Hadoop?

564

Differentiate Reducer and Combiner in Hadoop MapReduce?

642

What is optimal size of a file for distributed cache?

598

how can you check whether Namenode is working beside using the jps command?

638

In Hadoop what is InputSplit?

596

What happens if the quantity of the reducer is 0 in mapreduce?

564

Explain combiners.

601

Can you tell us how many daemon processes run on a hadoop system?

556

In Hadoop, which file controls reporting in Hadoop?

753

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