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Topic :: Apache Hadoop





Apache Hadoop Interview Questions
Questions Answers Views Company eMail

Why Hadoop MapReduce?

 633

Explain slot in Hadoop Map-Reduce v1?

 637

Where sorting is done in Hadoop MapReduce Job?

 613

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

 603

Is reduce-only job possible in Hadoop MapReduce?

 655

Differentiate Reducer and Combiner in Hadoop MapReduce?

 631

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

 605

What is the need of MapReduce in Hadoop?

 595

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

 628

What is Data Locality in Hadoop?

 614

What is KeyValueTextInputFormat in Hadoop MapReduce?

 768

What is Mapper in Hadoop MapReduce?

 692

Which Sorting algorithm is used in Hadoop MapReduce?

 565

Define Writable data types in Hadoop MapReduce?

 604

What is shuffling and sorting in Hadoop MapReduce?

 590



Related Topics


Un-Answered Questions { Apache Hadoop }

What is Apache Hadoop YARN?

1417

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

961

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

850

What are the core components of Apache Hadoop?

718

What is the difference between Apache Hadoop and RDBMS?

743

How is security achieved in Apache Hadoop?

836

What is Apache Hadoop?

800

What is a “Distributed Cache” in Apache Hadoop?

725

What is the problem with small files in Apache Hadoop?

729

What is Rack Awareness in Apache Hadoop?

750

Explain Erasure Coding in Apache Hadoop?

693

What is Disk Balancer in Apache Hadoop?

802

What is a speculative execution in Apache Hadoop MapReduce?

739

What are the modes in which Apache Hadoop run?

747

What is Safemode in Apache Hadoop?

684