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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?

 480

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

 540

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

 506

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

 587

What is JPS? Why is it used in Hadoop?

 525

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

 488

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

 538

Ideally what should be replication factor in a Hadoop cluster?

 518

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

 468

How often DataNode send heartbeat to NameNode in Hadoop?

 536

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

 519

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

 532

What is Erasure Coding in Hadoop?

 506

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

 563

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

 515



Related Topics


Un-Answered Questions { Apache Hadoop }

What is Apache Hadoop YARN?

1456

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

1006

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

907

What are the core components of Apache Hadoop?

784

What is the difference between Apache Hadoop and RDBMS?

807

How is security achieved in Apache Hadoop?

909

What is Apache Hadoop?

851

What is a “Distributed Cache” in Apache Hadoop?

777

What is the problem with small files in Apache Hadoop?

783

What is Rack Awareness in Apache Hadoop?

811

Explain Erasure Coding in Apache Hadoop?

751

What is Disk Balancer in Apache Hadoop?

889

What is a speculative execution in Apache Hadoop MapReduce?

793

What are the modes in which Apache Hadoop run?

800

What is Safemode in Apache Hadoop?

735