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

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

What are the benefits of block transfer?

642

How did you debug your Hadoop code ?

996

What will you do when NameNode is down?

667

What is the best hardware configuration to run Hadoop?

1325

Should we use RAID in Hadoop or not?

699

How to change Replication Factor For below cases ?

675

What are the basic available commands in Hadoop sqoop ?

660

On What concept the Hadoop framework works?

880

How to write a Custom Key Class?

633

What if rack 2 and datanode fails?

787

How client application interacts with the NameNode?

664

How is the option in Hadoop to skip the bad records?

670

How the HDFS Blocks are replicated?

638

Explain InputFormat?

663

What is Rack awareness?

677

Un-Answered Questions { Hadoop }

Name various types of Cluster Managers in Spark.

203

What are the different types of UDF's in Java supported by Apache Pig?

609

what happens in textinformat ?

391

What is the main objective of creating Cassandra?

Clarify what webdav is in hadoop?

221

Can you give a detailed overview about the Big Data being generated by Facebook?

249

When should you use cassandra?

What are the roles and responsibilities of worker nodes in the Apache Spark cluster? Is Worker Node in Spark is same as Slave Node?

239

Explain the difference between an hdfs block and input split?

What is a partitioning key?

301

What is the need of MapReduce in Hadoop?

366

How can we create table by using command?

Describe DataStaxOpsCenter?

What is difference between cache and persist in spark?

192

What are the ways to launch Apache Spark over YARN?

192

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