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

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

What is configuration of a typical slave node on Hadoop cluster? How many JVMs run on a slave node?

1003

What is HDFS block size and what did you chose in your project?

937

What is HDFS High Availability?

926

What are different types of filesystem?

1094

how can we change Replication Factor?

981

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

856

What are the core components of Apache Hadoop?

728

What is the difference between Apache Hadoop and RDBMS?

752

How is security achieved in Apache Hadoop?

842

What is Apache Hadoop?

807

What is a “Distributed Cache” in Apache Hadoop?

729

What is the problem with small files in Apache Hadoop?

735

What is Rack Awareness in Apache Hadoop?

752

Explain Erasure Coding in Apache Hadoop?

704

What is Disk Balancer in Apache Hadoop?

808

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Un-Answered Questions { Apache Hadoop }

what are the steps involved in commissioning adding

877

Does hadoop always require digital data to process?

1124

What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?

1284

Did you ever ran into a lop sided job that resulted in out of memory error

1175

Define a metadata?

609

What is Input Split in hadoop?

923

What is the purpose of button groups?

697

Input Split & Record Reader and what they do?

975

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

598

What is the difference between a Hadoop and Relational Database and Nosql?

1035

What is the purpose of RawComparator interface?

1076

What is a Record Reader in hadoop?

914

Define streaming?

615

Explain the benefits of block transfer?

765

What is the use of combiners in the hadoop framework?

585

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