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 a block and block scanner in HDFS?

980

What is compute and Storage nodes?

985

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

926

How can you overwrite the replication factors in HDFS?

1176

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

958

Knox and Hadoop Development Tools?

876

In which location Name Node stores its Metadata and why?

1349

Is a job split into maps?

986

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

1009

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

880

What are the site-specific configuration files in Hadoop?

1014

On what basis data will be stored on a rack?

1070

How is HDFS fault tolerant?

993

How to Administering Hadoop?

864

What are the main components of a Hadoop Application?

981

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Un-Answered Questions { Apache Hadoop }

How blocks are distributed among all data nodes for a particular chunk of data?

1038

What is DistributedCache and its purpose?

859

How does a namenode handle the failure of the data nodes?

636

What is Distributed Cache?

853

Why the name ‘hadoop’?

572

How hdfa differs with nfs?

671

What is small file problem in hadoop?

714

What is MapFile?

925

What is NoSQL?

873

How we can take Hadoop out of Safe Mode?

819

Explain the Job OutputFormat?

912

Rack awareness of Namenode?

808

What are combiners and its purpose?

881

What is unstructured data?

601

What is yarn in hadoop?

631

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