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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?

 410

What is a Heartbeat in Hadoop?

 521

Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

 471

What is a Backup node in Hadoop?

 500

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

 460

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

 539

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

 1240

What is Balancer in Hadoop?

 430

What is active and passive NameNode in Hadoop?

 440

How NameNode tackle Datanode failures in Hadoop?

 431

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

 393

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

 418

What is Mapper in Hadoop?

 502

What is Reducer in Hadoop?

 506

What are the most common InputFormats in Hadoop?

 550



Related Topics


Un-Answered Questions { Apache Hadoop }

What is Apache Hadoop YARN?

1416

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

958

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

845

What are the core components of Apache Hadoop?

712

What is the difference between Apache Hadoop and RDBMS?

736

How is security achieved in Apache Hadoop?

833

What is Apache Hadoop?

800

What is a “Distributed Cache” in Apache Hadoop?

723

What is the problem with small files in Apache Hadoop?

725

What is Rack Awareness in Apache Hadoop?

745

Explain Erasure Coding in Apache Hadoop?

691

What is Disk Balancer in Apache Hadoop?

798

What is a speculative execution in Apache Hadoop MapReduce?

739

What are the modes in which Apache Hadoop run?

743

What is Safemode in Apache Hadoop?

677