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

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

What is configuration of a typical slave node on Hadoop cluster? How many JVMs run on a slave node?

1032

What is HDFS block size and what did you chose in your project?

976

What is HDFS High Availability?

962

What are different types of filesystem?

1142

how can we change Replication Factor?

1019

What is Apache Hadoop? Why is Hadoop essential for every Big Data application?

907

What are the core components of Apache Hadoop?

784

What is the difference between Apache Hadoop and RDBMS?

807

How is security achieved in Apache Hadoop?

909

What is Apache Hadoop?

851

What is a “Distributed Cache” in Apache Hadoop?

777

What is the problem with small files in Apache Hadoop?

783

What is Rack Awareness in Apache Hadoop?

811

Explain Erasure Coding in Apache Hadoop?

751

What is Disk Balancer in Apache Hadoop?

889

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Un-Answered Questions { Apache Hadoop }

Can we call vms as pseudos?

653

Is hadoop obsolete?

633

What is the difference between Apache Hadoop and RDBMS?

807

What platform and java version are required to run hadoop?

694

Is it possible to provide multiple inputs to hadoop? If yes, explain.

657

Define fault tolerance?

654

What is Apache Hadoop YARN?

1456

How many instances of a jobtracker run on hadoop cluster?

641

Define a commodity hardware? Does commodity hardware include ram?

744

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

1358

Define a job tracker?

701

Have you ever used Counters in Hadoop. Give us an example scenario?

1063

What Mapper does?

984

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

1231

What is Hadoop Custom partitioner ?

1001

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