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 do you mean by taskinstance?

501

How hdfa differs with nfs?

493

How a task is scheduled by a jobtracker?

493

How many maximum jvm can run on a slave node?

513

What are the two main parts of the hadoop framework?

467

What is the use of combiners in the hadoop framework?

461

What is the jobtracker?

466

What is the jobtracker and what it performs in a hadoop cluster?

474

How many instances of tasktracker run on a hadoop cluster?

513

Explain the use of tasktracker in the hadoop cluster?

487

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

514

What do you know about sequencefileinputformat?

453

Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?

479

Why the name ‘hadoop’?

463

What do you know about nlineoutputformat?

513

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Un-Answered Questions { Apache Hadoop }

How many instances of JobTracker can run on a Hadoop Cluser?

764

Explain the difference between NameNode

745

How does master slave architecture in the hadoop?

538

How hdfa differs with nfs?

493

What is Hadoop Custom partitioner ?

834

What is the full form of fsck?

518

What is output format in hadoop?

511

Does this lead to security issues?

530

What is version-id mismatch error in hadoop?

860

Input Split & Record Reader and what they do?

774

Can you explain how do ‘map’ and ‘reduce’ work?

479

Explain the Job OutputFormat?

789

Define a job tracker?

504

What are the different types of Znodes?

799

Does hadoop always require digital data to process?

932

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