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Topic :: Apache Hadoop





Apache Hadoop Interview Questions
Questions Answers Views Company eMail

Why is Data Block size set to 128 MB in Hadoop?

 468

What is a Heartbeat in Hadoop?

 599

Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

 544

What is a Backup node in Hadoop?

 601

What do you mean by the NameNode High Availability in hadoop?

 527

What is the default replication factor in Hadoop and how will you change it?

 632

Why Hadoop performs replication, although it results in data redundancy?

 1307

What is Balancer in Hadoop?

 520

What is active and passive NameNode in Hadoop?

 497

How NameNode tackle Datanode failures in Hadoop?

 509

Is Namenode machine same as DataNode machine as in terms of hardware in Hadoop?

 474

If DataNode increases, then do we need to upgrade NameNode in Hadoop?

 492

What is Mapper in Hadoop?

 590

What is Reducer in Hadoop?

 591

What are the most common InputFormats in Hadoop?

 639



Related Topics


Un-Answered Questions { Apache Hadoop }

What is Apache Hadoop YARN?

1490

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

1041

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

955

What are the core components of Apache Hadoop?

815

What is the difference between Apache Hadoop and RDBMS?

840

How is security achieved in Apache Hadoop?

951

What is Apache Hadoop?

891

What is a “Distributed Cache” in Apache Hadoop?

809

What is the problem with small files in Apache Hadoop?

832

What is Rack Awareness in Apache Hadoop?

849

Explain Erasure Coding in Apache Hadoop?

791

What is Disk Balancer in Apache Hadoop?

939

What is a speculative execution in Apache Hadoop MapReduce?

821

What are the modes in which Apache Hadoop run?

828

What is Safemode in Apache Hadoop?

769