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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?

 100

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

 40

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

 44

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

 45

What is the difference between RDBMS with Hadoop MapReduce?

 852

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

 822

What is a Speculative Execution in Hadoop MapReduce?

 711

What counter in Hadoop MapReduce?

 702

What is SequenceFileInputFormat in Hadoop MapReduce?

 676

How many Mappers run for a MapReduce job in Hadoop?

 659

How do Hadoop MapReduce works?

 791

What is a Distributed Cache in Hadoop?

 708

What is the problem with the small file in Hadoop?

 697

How many Reducers run for a MapReduce job in Hadoop?

 632

What is MapReduce in Hadoop?

 699



Related Topics


Un-Answered Questions { Apache Hadoop }

What is Apache Hadoop YARN?

1499

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

1048

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

969

What are the core components of Apache Hadoop?

829

What is the difference between Apache Hadoop and RDBMS?

856

How is security achieved in Apache Hadoop?

965

What is Apache Hadoop?

900

What is a “Distributed Cache” in Apache Hadoop?

824

What is the problem with small files in Apache Hadoop?

839

What is Rack Awareness in Apache Hadoop?

859

Explain Erasure Coding in Apache Hadoop?

804

What is Disk Balancer in Apache Hadoop?

953

What is a speculative execution in Apache Hadoop MapReduce?

835

What are the modes in which Apache Hadoop run?

840

What is Safemode in Apache Hadoop?

781