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?

962

How did you debug your Hadoop code ?

1328

What will you do when NameNode is down?

963

What is the best hardware configuration to run Hadoop?

1596

Should we use RAID in Hadoop or not?

1020

How to change Replication Factor For below cases ?

1043

What are the basic available commands in Hadoop sqoop ?

925

On What concept the Hadoop framework works?

1168

How to write a Custom Key Class?

899

What if rack 2 and datanode fails?

1026

How client application interacts with the NameNode?

920

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

928

How the HDFS Blocks are replicated?

919

Explain InputFormat?

978

What is Rack awareness?

961

Un-Answered Questions { Hadoop }

Explain the core components of hadoop?

625

What is a row in cassandra? And what are the different elements of it?

How can we control particular key should go in a specific reducer?

880

How is transformation on rdd different from action?

338

What is off heap memory in spark?

297

Main Components of Hadoop?

732

What is the user of sparkContext?

300

What are the different Complex Data Types available in Hive?

874

How does inputsplit in mapreduce determines the record boundaries correctly?

622

Explain what is wal and hlog in hbase?

301

How Sqoop can be used in a Java program?

What does the "USE" command in hive do?

739

Is kafka part of hadoop?

476

What are the four basic parameters of a mapper?

530

What are the 2 modes used to run pig scripts?

585

For More Un-Answered { Hadoop } Questions Click Here