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Topic :: Apache Hadoop





Apache Hadoop Interview Questions
Questions Answers Views Company eMail

What are the major differences between Hadoop 2 and Hadoop 3?

 534

What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?

 580

How to specify more than one path for storage in Hadoop?

 564

What is a single point of failure in Hadoop 1 and how is it resolved in Hadoop 2?

 645

What is JPS? Why is it used in Hadoop?

 588

What is the key difference between NameNode and DataNode in Hadoop?

 535

What is Small File Problem in Hadoop? How can it be resolved?

 599

Ideally what should be replication factor in a Hadoop cluster?

 561

What is NameNode? How NameNode tackle Datanode failures in Hadoop?

 506

How often DataNode send heartbeat to NameNode in Hadoop?

 590

What is Mapper? How can we compress Mapper output in Hadoop?

 562

What is Rack Awareness? What is its need in Hadoop?

 581

What is Erasure Coding in Hadoop?

 553

Why do we need Hadoop Archives? How is it created?

 613

What is Slot in Hadoop v1? Why was it removed from Hadoop v2?

 559



Related Topics


Un-Answered Questions { Apache Hadoop }

What is Apache Hadoop YARN?

1499

What are the modules that constitute the Apache Hadoop 2.0 framework?

1048

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

969

What are the core components of Apache Hadoop?

829

What is the difference between Apache Hadoop and RDBMS?

856

How is security achieved in Apache Hadoop?

965

What is Apache Hadoop?

900

What is a “Distributed Cache” in Apache Hadoop?

824

What is the problem with small files in Apache Hadoop?

839

What is Rack Awareness in Apache Hadoop?

859

Explain Erasure Coding in Apache Hadoop?

803

What is Disk Balancer in Apache Hadoop?

953

What is a speculative execution in Apache Hadoop MapReduce?

834

What are the modes in which Apache Hadoop run?

840

What is Safemode in Apache Hadoop?

781