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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?

527

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

489

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?

507

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 }

In ambari what are the different life cycle commands?

39


If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?

451


What is a "Spark Executor"?

349


What do you understand by Consistency in Cassandra?

74


Name the ports Cassandra uses?

75


What do you understand by Filters in HBase?

143


How is hadoop different from spark?

270


Explain Multi-tenancy?

556


What are Actions?

319


How the read operation is performed on Cassandra node ?

102


Give some points of hive for hadoop ?

722


What rdd stands for?

320


What is a speculative execution in Apache Hadoop MapReduce?

793


What are the exception handling operators in Pig script?

578


Can you tell us more about ssh?

716