Apache Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

Explain why do we need hadoop?

621

Explain the features of pseudo mode?

660

What do shuffling do?

625

Explain the basic difference between traditional rdbms and hadoop?

614

Explain what if rack 2 and datanode fails?

598

Define a job tracker?

649

Explain the features of fully distributed mode?

582

What are the characteristics of hadoop framework?

628

Explain how can we change the split size if our commodity hardware has less storage space?

598

Explain how is hadoop different from other data processing tools?

684

Define a datanode?

601

Is secondary namenode a substitute to the namenode?

634

What is a secondary namenode?

580

What is unstructured data?

608

Explain the overview of hadoop history breifly?

572

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Un-Answered Questions { Apache Hadoop }

What stored in HDFS?

870

What is a Combiner?

694

Define a task tracker?

610

Explain the basic difference between traditional rdbms and hadoop?

614

What is compute and Storage nodes?

990

How hdfa differs with nfs?

682

Who is a 'user' in HDFS?

847

Why the name ‘hadoop’?

581

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

629

What are the main components of a Hadoop Application?

994

What is a Task instance in Hadoop? Where does it run?1

827

How you can contact your client everyday ?

927

What is Apache Hadoop?

807

Is it necessary to write jobs for hadoop in the java language?

625

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

908

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