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 ?

899

Explain Working of MapReduce?

918

Write a Mapreduce Program for Character Count ?

1002

how to proceed to write your first mapreducer program?

1303

How to set the number of reducers?

1311

Developing a MapReduce Application?

896

Different ways of debugging a job in MapReduce?

1057

Explain the Reducer's reduce phase?

1007

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

1 2677

What are the functions of NameNode?

1 1889

How to configure hadoop to reuse JVM for mappers?

1151

mapper or reducer?

935

How to resolve IOException: Cannot create directory

961

Does Pig support multi-line commands?

861

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

954

Un-Answered Questions { Big Data }

What is the difference between apache mahout and apache spark’s mllib?

What are snapshots and how do you create one in cassandra?

In MapReduce Data Flow, when Combiner is called?

599

What is rdd in spark with example?

262

How to restrict the number of lines to be printed in pig ?

540

Name the management tools in Cassandra?

Can you explain worker node?

387

How will you implement joins in HBase?

172

Explain Spark Driver?

310

What is the MapReduce plan in pig architecture?

1010

What can be optimum value for Reducer?

899

What are components of Cassandra Data Model?

What is the purpose of sqoop-merge?

Explain what do you understand by cassandra- cql collections?

In hadoop_pid_dir, what does pid stands for?

473

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