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

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?

722

How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?

728

How does an hadoop application look like or their basic components?

728

What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?

669

What are the important differences between apache and hadoop?

705

What is the difference between rdbms and hadoop?

646

Define tasktracker.

658

Is it necessary to write jobs for hadoop in the java language?

661

Which command is used for the retrieval of the status of daemons running the hadoop cluster?

718

What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?

783

Is it necessary to know java to learn hadoop?

663

Explain the use of .mecia class?

784

What is the sequencefileinputformat in hadoop?

713

What is the difference between hadoop and other data processing tools?

688

Which data storage components are used by hadoop?

666

Post New Apache Hadoop Questions

Un-Answered Questions { Apache Hadoop }

How to keep HDFS cluster balanced?

1097

Is hadoop based on google mapreduce?

691

How client application interacts with the NameNode?

957

What is the function of NodeManager?

907

What are sink processors?

912

Is hadoop a database?

685

Define fault tolerance?

654

What platform and java version are required to run hadoop?

694

What is the purpose of DataNode block scanner?

968

How does a namenode handle the failure of the data nodes?

691

What are the site-specific configuration files in Hadoop?

1091

What is a block and block scanner in HDFS?

1030

Why is Apache Spark faster than Apache Hadoop?

842

Which command is used for the retrieval of the status of daemons running the hadoop cluster?

718

Explain the features of pseudo mode?

703

For More Un-Answered { Apache Hadoop } Questions Click Here