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

Knox and Hadoop Development Tools?

977

In which location Name Node stores its Metadata and why?

1428

Is a job split into maps?

1078

What are different hdfs dfs shell commands to perform copy operation?

1097

If a data Node is full how it's identified?

986

How many filters are available in HBase?

468

What are the site-specific configuration files in Hadoop?

1135

On what basis data will be stored on a rack?

1180

How is HDFS fault tolerant?

1077

How to Administering Hadoop?

952

What are the main components of a Hadoop Application?

1080

How to resolve small file problem in hdfs?

1028

what factors the block size takes before creation?

1095

Which are the two types of 'writes' in HDFS?

1268

Explain use cases where SequenceFile class can be a good fit?

988

Un-Answered Questions { Hadoop }

What is the difference between External and Internal Table in Hive?

783

What is the difference between Input Split and an HDFS Block?

Can you explain the term, Cassandra?

110

Is cache an action in spark?

312

what do you mean by the worker node?

326

Explain the need for MapReduce while programming in Apache Pig?

811

Why do we need spark?

294

What is a row in cassandra? And what are the different elements of it?

List out the difference between textFile and wholeTextFile in Apache Spark?

420

Explain the process to trigger automatic clean-up in Spark to manage accumulated metadata.

325

What is a generic udf in hive?

775

Hive new version supported Hadoop Versions ?

647

What are the major features/characteristics of rdd (resilient distributed datasets)?

321

In how many ways RDDs can be created? Explain.

313

How did you debug your Hadoop code ?

1413

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