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 Mapper is instantiated in a running job?

1029

Where do you specify the Mapper Implementation?

1049

What is the meaning of speculative execution in Hadoop? Why is it important?

1086

What is the InputFormat ?

1056

Command to format the NameNode?

977

Who is a 'user' in HDFS?

931

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

1345

did you maintain the hadoop cluster in-house or used hadoop in the cloud?

1048

What is DistributedCache and its purpose?

937

What is HDFS ? How it is different from traditional file systems?

944

What is HDFS Block size? How is it different from traditional file system block size?

1 1499

How you can contact your client everyday ?

1004

What is Input Split in hadoop?

1034

What is 'Key value pair' in HDFS?

1000

How to keep HDFS cluster balanced?

1128

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Un-Answered Questions { Apache Hadoop }

Mention what is the number of default partitioner in Hadoop?

739

What is the function of ApplicationMaster?

1006

What is structured data?

687

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

1147

What is hadoop framework?

757

How hdfa differs with nfs?

776

How to use Apache Zookeeper command line interface?

1193

What is HDFS - Hadoop Distributed File System?

1002

How do you categorize a big data?

823

What is the meaning of speculative execution in Hadoop? Why is it important?

1086

What is the InputFormat ?

1056

What is Row Key?

1027

Is hadoop the future?

687

Where do you specify the Mapper Implementation?

1049

How many instances of tasktracker run on a hadoop cluster?

720

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