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

Explain Erasure Coding in Apache Hadoop?

801

What is Disk Balancer in Apache Hadoop?

951

What is a speculative execution in Apache Hadoop MapReduce?

831

What are the modes in which Apache Hadoop run?

840

What is Safemode in Apache Hadoop?

781

What are the different methods to run Spark over Apache Hadoop?

765

Why is Apache Spark faster than Apache Hadoop?

882

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

533

What are the configuration files in Hadoop?

578

Compare Apache Hadoop and Apache Spark?

480

What are the different modes in which we can configure/install Hadoop?

585

Explain how Hadoop cluster hardware planning and provisioning is done?

601

How to create a user in Hadoop?

534

What are the major differences between Hadoop 2 and Hadoop 3?

530

What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?

578

Un-Answered Questions { Hadoop }

What is the fundamental difference between a MapReduce InputSplit and HDFS block?

673

Bag in pig ?

615

How can you set an arbitrary number of mappers to be created for a job in Hadoop?

501

What database are supported by Hive?

747

State use cases of impala?

What are accumulators in spark?

326

Why we are using flume?

What daemons run on master nodes?

517

what is WebDAV in Hadoop?

794

What is pipelined rdd?

267

What is column store db? Explain with an example.

Explain countByValue() operation in Apache Spark RDD?

286

How does speculative execution work in Hadoop?

483

How much faster is Apache spark than Hadoop?

307

What are the three different modes in which hive can be run?

736

For More Un-Answered { Hadoop } Questions Click Here