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Apache Hadoop Interview Questions
Questions Answers Views Company eMail

What do you mean by taskinstance?

 379

How hdfa differs with nfs?

 389

How a task is scheduled by a jobtracker?

 392

How many maximum jvm can run on a slave node?

 410

What are the two main parts of the hadoop framework?

 352

What is the use of combiners in the hadoop framework?

 360

What is the jobtracker?

 362

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

 368

How many instances of tasktracker run on a hadoop cluster?

 404

Explain the use of tasktracker in the hadoop cluster?

 370

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

 416

What do you know about sequencefileinputformat?

 359

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

 377

Why the name ‘hadoop’?

 389

What do you know about nlineoutputformat?

 391

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Un-Answered Questions { Apache Hadoop }

What is a speculative execution in Apache Hadoop MapReduce?

434

What is InputSplit and RecordReader?

633

What are the four characteristics of Big Data?

437

what are the nodes in the Hadoop cluster?

658

What are the steps to submit a Hadoop job?

602




What is salary of hadoop developer?

386

What are the characteristics of hadoop framework?

367

Is secondary namenode a substitute to the namenode?

418

Define fault tolerance?

393

What is rack-aware replica placement policy?

693

What happens to a namenode, when job tracker is down?

413

What is HDFS Federation?

649

What is Input Split in hadoop?

622

What is Apache Hadoop? Why is Hadoop essential for every Big Data application?

528

What is the difference between rdbms and hadoop?

388

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