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?

852

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?

752

What is Disk Balancer in Apache Hadoop?

889

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Un-Answered Questions { Apache Hadoop }

What do you mean by taskinstance?

747

Explain the master class and the output class do?

652

Why do we use Hadoop?

925

Why do we need a password-less ssh in fully distributed environment?

709

What are the default configuration files that are used in hadoop?

691

Explain what is sqoop in Hadoop ?

726

Why password is needed in ssh localhost?

801

Define a datanode?

646

What are the site-specific configuration files in Hadoop?

1091

What is Safemode in Apache Hadoop?

735

What do the master class and the output class do?

667

In which location Name Node stores its Metadata and why?

1393

What is the difference between hadoop and other data processing tools?

688

What is the purpose of DataNode block scanner?

966

Explain the overview of hadoop history breifly?

623

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