Apache Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

Explain the difference between NameNode

941

What other technologies have you used in hadoop sta ck?

984

what is difference between int and intwritable?

1475

What is Apache Hadoop YARN?

1456

What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?

1112

What are channel selectors?

1029

What are the stable versions of Hadoop?

1017

Input Split & Record Reader and what they do?

1030

what is the default replication factor in HDFS?

1017

How indexing is done in HDFS?

1086

Why are the number of splits equal to the number of maps?

961

What are the two main components of ResourceManager?

1164

How will you make changes to the default configuration files?

963

What are the different types of Znodes?

981

How many instances of JobTracker can run on a Hadoop Cluser?

1022

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Un-Answered Questions { Apache Hadoop }

How can one increase replication factor to a desired value in Hadoop?

1120

when hadoop enter in safe mode?

744

What is InputSplit and RecordReader?

960

Can hbase run without hadoop?

743

How do you define "block" in HDFS?

899

What do you know about nlineoutputformat?

684

How can I install Cloudera VM in my system?

958

did you maintain the hadoop cluster in-house or used hadoop in the cloud?

1018

Why do we need a password-less ssh in fully distributed environment?

709

Explain what if rack 2 and datanode fails?

636

how would you modify that solution to only count the number of unique words in all the documents?

973

Why password is needed in ssh localhost?

801

Define a namenode?

662

what is meaning Replication factor?

951

What is Derby database?

902

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