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?

1036

How did you debug your Hadoop code ?

1413

What will you do when NameNode is down?

1059

What is the best hardware configuration to run Hadoop?

1667

Should we use RAID in Hadoop or not?

1112

How to change Replication Factor For below cases ?

1152

What are the basic available commands in Hadoop sqoop ?

1012

On What concept the Hadoop framework works?

1237

How to write a Custom Key Class?

975

What if rack 2 and datanode fails?

1103

How client application interacts with the NameNode?

993

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

986

How the HDFS Blocks are replicated?

1003

Explain InputFormat?

1071

What is Rack awareness?

1043

Un-Answered Questions { Hadoop }

Differentiate between GROUP and COGROUP operators?

675

What is a metastore in hive?

746

Bag in pig ?

615

What are the different types of Znodes?

1013

How to enable recycle bin in hadoop?

800

How do I start flume in hadoop?

What is difference between scala and spark?

331

What is the use of “resultset execute” method?

What are the different catalog tables in hbase?

180

How can one check whether NameNode is working or not?

583

Define RDD?

337

What are the features of kafka?

583

Is there any difference between FileSink and FileRollSink?

What bit version ambary needs and list out the operating system that are compatible?

Discuss the role of Spark driver in Spark application?

296

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