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

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

How to resolve small file problem in hdfs?

930

what factors the block size takes before creation?

969

Which are the two types of 'writes' in HDFS?

1174

Explain use cases where SequenceFile class can be a good fit?

904

Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?

1010

What is difference between regular file system and HDFS?

998

What is rack-aware replica placement policy?

977

What is Hadoop?

1 1562

Are Namenode and job tracker on the same host?

1407

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1067

What is HDFS Federation?

934

What are watches?

985

Explain the Job OutputFormat?

915

Virtual Box & Ubuntu Installation?

933

What is the difference between HDFS and NAS ?

1319

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Un-Answered Questions { Apache Hadoop }

What is Partioner in hadoop? Where does it run

931

What is a Secondary Namenode? Is it a substitute to the Namenode?

990

What is the port number for NameNode

801

What is yarn in hadoop?

640

What is a block and block scanner in HDFS?

983

Explain the core components of hadoop?

613

How a task is scheduled by a jobtracker?

632

Define a combiner?

608

Can NameNode and DataNode be a commodity hardware?

1642

Where is the Mapper Output stored?

1337

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

695

How to come out of the insert mode?

723

what is meaning Replication factor?

911

Is client the end user in HDFS?

947

Is hadoop obsolete?

591

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