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

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

How Pig differs from MapReduce?

808

Why are the number of splits equal to the number of maps?

961

What are the Data types in Pig?

913

What are the two main components of ResourceManager?

1166

MapReduce Types and Formats and Setting up a Hadoop Cluster?

905

How will you make changes to the default configuration files?

968

What are the different types of Znodes?

983

How many instances of JobTracker can run on a Hadoop Cluser?

1022

What's the best way to copy files between HDFS clusters?

1358

Can Apache Kafka be used without Zookeeper?

1035

What is Your Cluster size ?

1439

What is the default block size in hdfs?

1043

What are active and passive "NameNodes"?

1467

It can be possible that a Job has 0 reducers?

965

What are combiners and its purpose?

931

Un-Answered Questions { Hadoop }

Is it mandatory to set input and output type/format in MapReduce?

732

What do you understand from Node redundancy and is it exist in hadoop cluster?

1233

What is a flume agent?

What are Features of Hive?

724

What are the Applications of Apache Pig?

571

How would you diagnose or do exception handling in the pig?

971

Which serialization libraries are supported in spark?

332

What is RDD Lineage?

417

What is a spark rdd?

315

State one best feature of Kafka?

516

Explain about the different types of trformations on dstreams?

302

How to change the replication factor of data which is already stored in HDFS?

Explain what is the role of the zookeeper?

497

What is the difference between map and flatmap?

305

What are the types of Transformation in Spark RDD Operations?

288

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