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 ?

948

Explain Working of MapReduce?

976

Write a Mapreduce Program for Character Count ?

1056

how to proceed to write your first mapreducer program?

1350

How to set the number of reducers?

1364

Developing a MapReduce Application?

971

Different ways of debugging a job in MapReduce?

1107

Explain the Reducer's reduce phase?

1066

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

1 2777

What are the functions of NameNode?

1 1992

How to configure hadoop to reuse JVM for mappers?

1206

mapper or reducer?

1005

How to resolve IOException: Cannot create directory

1026

Does Pig support multi-line commands?

906

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

1007

Un-Answered Questions { Big Data }

Explain the process of spilling in Hadoop MapReduce?

637

Which directory does hadoop install to?

491

What are the common mistakes developers make when running Spark applications?

286

How many types of nosql databases?

How can you use adminclient api?

588

What is the difference between cache and persist in spark?

333

What are 4 v's of big data?

296

Can hadoop replace relational database?

431

How can we see all the clusters that are available in Ambari?

143

What problem does Apache Flume solve?

101

What is amazon spark?

270

How data is spilt in Hadoop?

649

What is the use of cassandra cql collection?

Explain about ACID transactions in Hive?

737

What is the default level of parallelism in apache spark?

395

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