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

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

How can we change the split size if our commodity hardware has less storage space?

663

How is hadoop different from other data processing tools?

676

What happens in a textinputformat?

658

Can you explain how do ‘map’ and ‘reduce’ work?

734

Can we call vms as pseudos?

653

What do the master class and the output class do?

667

What does job conf class do?

668

What do you know about keyvaluetextinputformat?

600

Define a namenode?

662

Explain the hadoop-core configuration?

693

Explain the benefits of block transfer?

823

Define a task tracker?

643

Define a metadata?

652

Define a daemon?

668

Explain the core components of hadoop?

661

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Un-Answered Questions { Apache Hadoop }

Explain the wordcount implementation via hadoop framework ?

724

Explain InputFormat?

1015

How client application interacts with the NameNode?

957

What will you do when NameNode is down?

1003

What problems can be addressed by using Zookeeper?

941

What does the command mapred.job.tracker do?

777

What is unstructured data?

667

Command to format the NameNode?

935

What is the purpose of RawComparator interface?

1128

What is the meaning of the term "non-DFS used" in Hadoop web-console?

1308

Is hadoop the future?

651

Explain the features of fully distributed mode?

625

What is the problem with HDFS and streaming data like logs

1022

What is Input Split in hadoop?

980

In which location Name Node stores its Metadata and why?

1393

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