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Apache Hadoop Interview Questions
Questions Answers Views Company eMail

What is a block and block scanner in HDFS?

455

What is compute and Storage nodes?

411

how would you modify that solution to only count the number of unique words in all the documents?

461

How can you overwrite the replication factors in HDFS?

653

What are the modules that constitute the Apache Hadoop 2.0 framework?

429

Knox and Hadoop Development Tools?

384

In which location Name Node stores its Metadata and why?

755

Is a job split into maps?

452

What are different hdfs dfs shell commands to perform copy operation?

551

If a data Node is full how it's identified?

376

What are the site-specific configuration files in Hadoop?

396

On what basis data will be stored on a rack?

564

How is HDFS fault tolerant?

447

How to Administering Hadoop?

393

What are the main components of a Hadoop Application?

487


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Un-Answered Questions { Apache Hadoop }

What is small file problem in hadoop?

140


What are different hdfs dfs shell commands to perform copy operation?

551


Explain what happens in textinformat ?

161


What is partioner in hadoop? Where does it run,mapper or reducer?

129


What is version-id mismatch error in hadoop?

488






What is a Combiner?

171


Explain the hadoop-core configuration?

134


What are the network requirements for using hadoop?

118


Explain the Job OutputFormat?

456


What is the communication channel between client and namenode/datanode?

918


What are the additional benefits YARN brings in to Hadoop?

386


Define tasktracker.

136


What is Apache Hadoop?

207


What is high availability in hadoop?

126


What does the command mapred.job.tracker do?

145