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?

845

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

740

What is HDFS High Availability?

816

What are different types of filesystem?

934

how can we change Replication Factor?

794

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

683

What are the core components of Apache Hadoop?

528

What is the difference between Apache Hadoop and RDBMS?

553

How is security achieved in Apache Hadoop?

602

What is Apache Hadoop?

646

What is a “Distributed Cache” in Apache Hadoop?

549

What is the problem with small files in Apache Hadoop?

558

What is Rack Awareness in Apache Hadoop?

558

Explain Erasure Coding in Apache Hadoop?

525

What is Disk Balancer in Apache Hadoop?

588

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Un-Answered Questions { Apache Hadoop }

Explain the features of pseudo mode?

530

Explain what if rack 2 and datanode fails?

457

What will you do when NameNode is down?

766

Mention what is the use of Context Object?

543

Can we call vms as pseudos?

501

Explain the hadoop configuration files at present?

483

What is inputformat in hadoop?

559

How does NameNode tackle DataNode failures?

981

What is difference between regular file system and HDFS?

812

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

884

What is nlineoutputformat?

515

What is the difference between SQL and NoSQL?

792

What are watches?

823

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

777

What is speculative execution in Hadoop?

894

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