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Hadoop Interview Questions
Questions Answers Views Company eMail

How to specify more than one path for storage in Hadoop?

506

What is a single point of failure in Hadoop 1 and how is it resolved in Hadoop 2?

587

What is JPS? Why is it used in Hadoop?

525

What is the key difference between NameNode and DataNode in Hadoop?

488

What is Small File Problem in Hadoop? How can it be resolved?

538

Ideally what should be replication factor in a Hadoop cluster?

518

What is NameNode? How NameNode tackle Datanode failures in Hadoop?

468

How often DataNode send heartbeat to NameNode in Hadoop?

536

What is Mapper? How can we compress Mapper output in Hadoop?

519

What is Rack Awareness? What is its need in Hadoop?

532

What is Erasure Coding in Hadoop?

506

Why do we need Hadoop Archives? How is it created?

563

What is Slot in Hadoop v1? Why was it removed from Hadoop v2?

515

What is CAP Theorem? What aspects does Hadoop support from this theorem?

473

Why do we need Hadoop?

520


Un-Answered Questions { Hadoop }

What does it mean by Columnar Storage Format?

301


Can you explain data versioning?

172


JMX stands for?

108


Why HDFS stores data using commodity hardware despite the higher chance of failures?

40


What are the primary phases of a Reducer?

824


Explain Zookeeper Leader election?

5


Define paired RDD in Apache Spark?

279


State syntax of the command that is used to drop a partition?

5


What are the operating systems supported by Apache Ambari?

52


How can we create a hadoop cluster from scratch?

423


Can you explain about the indexing process in hdfs?

36


What does connector api in kafka?

507


Explain how can you debug hadoop code?

466


What do you mean by Stream Processing in Kafka?

522


Mention key components of Hive Architecture?

850