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?

739

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

908

What are the Data types in Pig?

867

What are the two main components of ResourceManager?

1090

MapReduce Types and Formats and Setting up a Hadoop Cluster?

876

How will you make changes to the default configuration files?

902

What are the different types of Znodes?

939

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

972

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

1319

Can Apache Kafka be used without Zookeeper?

971

What is Your Cluster size ?

1393

What is the default block size in hdfs?

983

What are active and passive "NameNodes"?

1398

It can be possible that a Job has 0 reducers?

928

What are combiners and its purpose?

882

Un-Answered Questions { Hadoop }

In which language apache kafka is written?

503

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

What is write ahead log(journaling) in Spark?

413

what are the different modes of Hive?

644

Explain caching in spark streaming.

279

How Hive distributes the rows into buckets?

744

Different ways of debugging a job in MapReduce?

1060

How does hdfs ensure information integrity of data blocks squares kept in hdfs?

Mention some machine learning algorithms exposed by mahout?

What is Pig Storage?

556

What are the parameters of mappers and reducers?

447

Ideally what should be replication factor in a Hadoop cluster?

477

What is keyvaluetextinputformat?

690

What is the process of creating ambari client?

List the various types of "Cluster Managers" in Spark.

320

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