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Topic :: Apache Hadoop





Apache Hadoop Interview Questions
Questions Answers Views Company eMail

What do you mean by metadata in HDFS? Where is it stored in Hadoop?

 84

How can one set space quota in Hadoop (HDFS) directory?

 26

What is a block in Hadoop HDFS? What should be the block size to get optimum performance from the Hadoop cluster?

 36

What do you mean by the High Availability of a NameNode in Hadoop HDFS?

 33

What is the difference between RDBMS with Hadoop MapReduce?

 764

How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?

 723

What is a Speculative Execution in Hadoop MapReduce?

 624

What counter in Hadoop MapReduce?

 606

What is SequenceFileInputFormat in Hadoop MapReduce?

 591

How many Mappers run for a MapReduce job in Hadoop?

 573

How do Hadoop MapReduce works?

 675

What is a Distributed Cache in Hadoop?

 610

What is the problem with the small file in Hadoop?

 608

How many Reducers run for a MapReduce job in Hadoop?

 562

What is MapReduce in Hadoop?

 600



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