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 ?

946

Explain Working of MapReduce?

972

Write a Mapreduce Program for Character Count ?

1054

how to proceed to write your first mapreducer program?

1344

How to set the number of reducers?

1362

Developing a MapReduce Application?

971

Different ways of debugging a job in MapReduce?

1106

Explain the Reducer's reduce phase?

1055

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

1 2775

What are the functions of NameNode?

1 1990

How to configure hadoop to reuse JVM for mappers?

1201

mapper or reducer?

999

How to resolve IOException: Cannot create directory

1018

Does Pig support multi-line commands?

899

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

1004

Un-Answered Questions { Big Data }

How to create and manage a view in HCatalog?

How is a keyspace created in cassandra?

124

What is SparkSession in Apache Spark?

290

Can we have different replication factor of the existing files in hdfs?

What is the significance of Sliding Window operation?

308

Define the Use of Pig?

550

What is throughput? How does HDFS provide good throughput?

Why is Cassandra popular? Clarify.

Who is intended audience to learn HCatalog?

What are the components of a Hive query processor?

732

How to save RDD?

314

Mention what are views in Hive?

694

What happen if one of the datanodes has much slower cpu?

431

Why does the picture of Spark come into existence?

312

Is apache spark a tool?

270

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