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

743

What other technologies have you used in hadoop sta ck?

811

what is difference between int and intwritable?

1191

What is Apache Hadoop YARN?

1271

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

874

What are channel selectors?

748

What are the stable versions of Hadoop?

811

Input Split & Record Reader and what they do?

761

what is the default replication factor in HDFS?

782

How indexing is done in HDFS?

811

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

764

What are the two main components of ResourceManager?

899

How will you make changes to the default configuration files?

665

What are the different types of Znodes?

791

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

761

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Un-Answered Questions { Apache Hadoop }

How the HDFS Blocks are replicated?

768

shouldn't DFS be able to handle large volumes of data already?

870

Are Namenode and job tracker on the same host?

1245

Explain the benefits of block transfer?

627

How to change from su to cloudera?

518

Is map like a pointer?

760

How does NameNode tackle DataNode failures?

969

How indexing is done in HDFS?

811

What is yarn in hadoop?

514

What are the hadoop's three configuration files?

490

What is Hadoop serialization?

495

How can you connect an application

822

What are the modes in which Apache Hadoop run?

542

What are watches?

811

Does google use hadoop?

470

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