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Topic :: Apache Hadoop





Apache Hadoop Interview Questions
Questions Answers Views Company eMail

Why Hadoop MapReduce?

 665

Explain slot in Hadoop Map-Reduce v1?

 688

Where sorting is done in Hadoop MapReduce Job?

 650

How many times combiner is called on a mapper node in Hadoop?

 643

Is reduce-only job possible in Hadoop MapReduce?

 697

Differentiate Reducer and Combiner in Hadoop MapReduce?

 680

How to write a custom partitioner for a Hadoop MapReduce job?

 651

What is the need of MapReduce in Hadoop?

 629

What is the difference between Reducer and Combiner in Hadoop MapReduce?

 677

What is Data Locality in Hadoop?

 669

What is KeyValueTextInputFormat in Hadoop MapReduce?

 804

What is Mapper in Hadoop MapReduce?

 733

Which Sorting algorithm is used in Hadoop MapReduce?

 599

Define Writable data types in Hadoop MapReduce?

 638

What is shuffling and sorting in Hadoop MapReduce?

 627



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