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?

994

How did you debug your Hadoop code ?

1371

What will you do when NameNode is down?

1008

What is the best hardware configuration to run Hadoop?

1628

Should we use RAID in Hadoop or not?

1058

How to change Replication Factor For below cases ?

1087

What are the basic available commands in Hadoop sqoop ?

964

On What concept the Hadoop framework works?

1200

How to write a Custom Key Class?

939

What if rack 2 and datanode fails?

1060

How client application interacts with the NameNode?

957

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

949

How the HDFS Blocks are replicated?

965

Explain InputFormat?

1019

What is Rack awareness?

999

Un-Answered Questions { Hadoop }

Explain HCatalog Create Table CLI along with its syntax?

Explain about the execution pl of a pig script?
or
differentiate between the logical and physical plan of an apache pig script?

509

What is spark sqlcontext?

300

How to resolve IOException: Cannot create directory

1017

Explain about the popular use cases of Apache Spark

428

How do I start flume in hadoop?

What comes in Hadoop 2.0 and MapReduce V2 YARN

1003

What a task tracker is in hadoop?

435

What do masters consist of?

694

what is Metastore in Hive?

677

What is InputSplit and RecordReader?

962

What is metadata storage service in bookkeeper?

What is the difference between a Hadoop and Relational Database and Nosql?

1076

How to use Hive using the command line and Beeline?

943

what does the text input format do?

817

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