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 ?

913

Explain Working of MapReduce?

928

Write a Mapreduce Program for Character Count ?

1012

how to proceed to write your first mapreducer program?

1312

How to set the number of reducers?

1326

Developing a MapReduce Application?

911

Different ways of debugging a job in MapReduce?

1067

Explain the Reducer's reduce phase?

1015

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

1 2684

What are the functions of NameNode?

1 1908

How to configure hadoop to reuse JVM for mappers?

1163

mapper or reducer?

939

How to resolve IOException: Cannot create directory

970

Does Pig support multi-line commands?

866

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

959

Un-Answered Questions { Big Data }

What is client mode in spark?

303

What is spark dynamic allocation?

288

What is contextual routing in flume?

816

What is the role of “ambari-qa” user?

What is the use of illustrate in pig?

484

What is the difference between an RDBMS and Hadoop?

612

What is the significance of using –compress-codec parameter?

Can you explain spark graphx?

276

Please explain the sparse vector in Spark.

272

How data is spilt in Hadoop?

624

How can we look for the namenode in the browser?

676

What are Prerequisites to learn Avro?

Name different elements of JConsole?

What is the key difference between NameNode and DataNode in Hadoop?

454

What are the different life cycle commands in ambari?

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