Apache Hadoop Interview Questions
Questions Answers Views Company eMail

How to resolve small file problem in hdfs?

641

what factors the block size takes before creation?

637

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

908

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

660

Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?

682

What is difference between regular file system and HDFS?

688

What is rack-aware replica placement policy?

684

What is Hadoop?

1 1105

Are Namenode and job tracker on the same host?

1029

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

702

What is HDFS Federation?

641

What are watches?

680

Explain the Job OutputFormat?

688

Virtual Box & Ubuntu Installation?

611

What is the difference between HDFS and NAS ?

951


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Un-Answered Questions { Apache Hadoop }

What is oozie in hadoop?

396


How the Client communicates with HDFS?

708


What are the benefits of block transfer?

636


What is Derby database?

623


How can you overwrite the replication factors in HDFS?

933






What are the characteristics of hadoop framework?

361


How to change replication factor of files already stored in HDFS?

689


Define a commodity hardware? Does commodity hardware include ram?

433


Explain the use of .mecia class?

482


Name the examples of some companies that are using hadoop structure?

384


Define tasktracker.

385


How client application interacts with the NameNode?

650


On what basis data will be stored on a rack?

821


What is the difference between HDFS and NAS ?

951


What is a Secondary Namenode? Is it a substitute to the Namenode?

700