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?

843

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

1011

What are the Data types in Pig?

953

What are the two main components of ResourceManager?

1197

MapReduce Types and Formats and Setting up a Hadoop Cluster?

965

How will you make changes to the default configuration files?

1015

What are the different types of Znodes?

1013

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

1053

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

1395

Can Apache Kafka be used without Zookeeper?

1087

What is Your Cluster size ?

1471

What is the default block size in hdfs?

1085

What are active and passive "NameNodes"?

1512

It can be possible that a Job has 0 reducers?

1010

What are combiners and its purpose?

978

Un-Answered Questions { Hadoop }

What do you know about nlineoutputformat?

737

Which modes can Hadoop be run in? List a few features for each mode?

505

Clarify the NoSQL Database?

Which are the elements of kafka?

633

Explain Cqlsh?

Explain the difference between Spark SQL and Hive.

402

What does adminclient api in kafka?

573

What are the main features and Characteristics of Hadoop which makes it the most popular and powerful Big Data tool?

531

According to IBM, what are the three characteristics of Big Data?

474

What is an "RDD Lineage"?

315

what is gossip protocol?

What is the use of map transformation?

324

What is the Hadoop MapReduce API contract for a key and value Class?

1353

What is faster than apache spark?

296

What is speculative execution in spark?

346

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