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?

1002

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?

1092

how can we change Replication Factor?

981

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

854

What are the core components of Apache Hadoop?

727

What is the difference between Apache Hadoop and RDBMS?

752

How is security achieved in Apache Hadoop?

841

What is Apache Hadoop?

804

What is a “Distributed Cache” in Apache Hadoop?

728

What is the problem with small files in Apache Hadoop?

734

What is Rack Awareness in Apache Hadoop?

751

Explain Erasure Coding in Apache Hadoop?

700

What is Disk Balancer in Apache Hadoop?

807

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Un-Answered Questions { Apache Hadoop }

What exactly is hadoop?

646

Explain the benefits of block transfer?

765

How can I restart namenode?

671

what is the typical block size of an HDFS block?

866

How would you tackle counting words in several text documents?

985

Define streaming?

615

In which location Name Node stores its Metadata and why?

1356

What are the modules that constitute the Apache Hadoop 2.0 framework?

963

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

1280

How do you define "block" in HDFS?

858

How is security achieved in Apache Hadoop?

841

What is unstructured data?

608

Explain how is hadoop different from other data processing tools?

683

How a task is scheduled by a jobtracker?

632

What is the difference between traditional RDBMS and Hadoop?

1134

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