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?

1453

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?

1015

How indexing is done in HDFS?

1086

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

959

What are the two main components of ResourceManager?

1164

How will you make changes to the default configuration files?

961

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 }

What is the relation between job and task in hadoop?

662

What infrastructure do we need to process 100 TB data using Hadoop?

1004

What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?

1075

What is Schema on Read and Schema on Write?

916

Explain how can we change the split size if our commodity hardware has less storage space?

648

Virtual Box & Ubuntu Installation?

989

Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?

1069

Which are the two types of 'writes' in HDFS?

1219

Why is hadoop faster?

650

Can we do online transactions(oltp) using hadoop?

669

what are the steps involved in commissioning adding

909

What is a checkpoint?

966

How a task is scheduled by a jobtracker?

674

What are the four characteristics of Big Data?

715

What is the function of ApplicationMaster?

966

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