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?

1033

How did you debug your Hadoop code ?

1413

What will you do when NameNode is down?

1057

What is the best hardware configuration to run Hadoop?

1665

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?

1235

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?

982

How the HDFS Blocks are replicated?

1003

Explain InputFormat?

1069

What is Rack awareness?

1043

Un-Answered Questions { Hadoop }

What is illustrate used for in apache pig?

637

On what basis name node distribute blocks across the data nodes?

1104

What are the main components of a Hadoop Application?

1080

Explain deletion in hbase? Mention what are the three types of tombstone markers in hbase?

148

Use of list-databases command in hadoop sqoop?

Why there is need of pig language?

620

How many types of rdd are there in spark?

322

how Cassandra writes changed data into commitlog?

105

Describe Memtable?

Explain some of the basic commands used for Apache Ambari server?

Hadoop sqoop word came from?

Who should learn Apache Ambari?

How many instances of tasktracker run on a hadoop cluster?

727

What are the basic steps to writing a UDF Function in Pig?

735

Why comparison of types is important for MapReduce?

1005

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