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Topic :: Apache Hadoop





Apache Hadoop Interview Questions
Questions Answers Views Company eMail

Why Hadoop MapReduce?

 698

Explain slot in Hadoop Map-Reduce v1?

 731

Where sorting is done in Hadoop MapReduce Job?

 682

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

 689

Is reduce-only job possible in Hadoop MapReduce?

 740

Differentiate Reducer and Combiner in Hadoop MapReduce?

 725

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

 693

What is the need of MapReduce in Hadoop?

 676

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

 724

What is Data Locality in Hadoop?

 714

What is KeyValueTextInputFormat in Hadoop MapReduce?

 854

What is Mapper in Hadoop MapReduce?

 782

Which Sorting algorithm is used in Hadoop MapReduce?

 636

Define Writable data types in Hadoop MapReduce?

 683

What is shuffling and sorting in Hadoop MapReduce?

 679



Related Topics


Un-Answered Questions { Apache Hadoop }

What is Apache Hadoop YARN?

1492

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

1042

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

956

What are the core components of Apache Hadoop?

816

What is the difference between Apache Hadoop and RDBMS?

841

How is security achieved in Apache Hadoop?

952

What is Apache Hadoop?

892

What is a “Distributed Cache” in Apache Hadoop?

811

What is the problem with small files in Apache Hadoop?

833

What is Rack Awareness in Apache Hadoop?

850

Explain Erasure Coding in Apache Hadoop?

792

What is Disk Balancer in Apache Hadoop?

940

What is a speculative execution in Apache Hadoop MapReduce?

822

What are the modes in which Apache Hadoop run?

829

What is Safemode in Apache Hadoop?

770