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Apache Hadoop Interview Questions
Questions Answers Views Company eMail

What is a speculative execution in Apache Hadoop MapReduce?

742

What are the modes in which Apache Hadoop run?

752

What is Safemode in Apache Hadoop?

690

What are the different methods to run Spark over Apache Hadoop?

680

Why is Apache Spark faster than Apache Hadoop?

792

What does ‘jps’ command do?

652

Mention what is the use of Context Object?

675

What is commodity hardware?

615

Explain what is sqoop in Hadoop ?

684

Explain how do ‘map’ and ‘reduce’ works?

698

Explain what is the purpose of RecordReader in Hadoop?

709

How to restart Namenode?

706

Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?

719

Mention what are the data components used by Hadoop?

625

What does /etc /init.d do?

661


Post New Apache Hadoop Questions

Un-Answered Questions { Apache Hadoop }

what is the typical block size of an HDFS block?

866


Explain Erasure Coding in Apache Hadoop?

700


How we can change Replication factor when Data is on the fly?

1302


Name the various types of lists supported by bootstrap.

620


What do you know about sequencefileinputformat?

596


Define a metadata?

609


What do the master class and the output class do?

629


Which data storage components are used by hadoop?

631


What are the characteristics of hadoop framework?

627


What is a secondary namenode?

580


What is inputformat in hadoop?

702


How we can take Hadoop out of Safe Mode?

824


What is the difference between traditional RDBMS and Hadoop?

1134


What problems can be addressed by using Zookeeper?

903


What are the main components of a Hadoop Application?

994