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?

944

Where do you specify the Mapper Implementation?

942

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

1015

What is the InputFormat ?

957

Command to format the NameNode?

886

Who is a 'user' in HDFS?

846

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

1235

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

966

What is DistributedCache and its purpose?

859

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

882

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

1 1375

How you can contact your client everyday ?

923

What is Input Split in hadoop?

919

What is 'Key value pair' in HDFS?

903

How to keep HDFS cluster balanced?

1050

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Un-Answered Questions { Apache Hadoop }

what is a datanode?

880

Explain the features of stand alone (local) mode?

580

Name some companies that use Hadoop?

912

What is HDFS block size and what did you chose in your project?

935

Explain the features of fully distributed mode?

577

Explain why do we need hadoop?

617

How many instances of tasktracker run on a hadoop cluster?

634

What is the use of combiners in the hadoop framework?

578

What stored in HDFS?

865

What is Apache Hadoop?

800

Define a metadata?

605

How hdfa differs with nfs?

671

Who invented hadoop?

632

What do shuffling do?

620

Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?

715

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