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

Big Data Interview Questions

Questions Answers Views Company eMail

What is a IdentityMapper and IdentityReducer in MapReduce ?

636

Explain Working of MapReduce?

664

Write a Mapreduce Program for Character Count ?

710

how to proceed to write your first mapreducer program?

1029

How to set the number of reducers?

1037

Developing a MapReduce Application?

656

Different ways of debugging a job in MapReduce?

803

Explain the Reducer's reduce phase?

705

Why do we use HDFS for applications having large data sets and not when there are lot of small files?

1 2120

What are the functions of NameNode?

1 1403

How to configure hadoop to reuse JVM for mappers?

791

mapper or reducer?

627

How to resolve IOException: Cannot create directory

675

Does Pig support multi-line commands?

570

How to change replication factor of files already stored in HDFS?

707

Un-Answered Questions { Big Data }

How does pig work?

355

What is sink processors?

What is network topology strategy?

How to get the single file as the output from MapReduce Job?

373

Describe DataStaxOpsCenter?

Why do fires spark?

191

What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?

953

What is nagios is used in ambari?

Are spark dataframes immutable?

182

When Hive is run in embedded mode

1578

How can you add the arbitrary key-value pairs in your mapper?

991

Describe join() operation. How is outer join supported?

176

Is hadoop required for data science?

403

What is a map in pig?

324

What is HDFS - Hadoop Distributed File System?

652

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