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 should be the ideal replication factor in Hadoop Cluster?

2 2611

How can one increase replication factor to a desired value in Hadoop?

891

What is a Record Reader in hadoop?

791

What is version-id mismatch error in hadoop?

853

how to share the metastore within multiple users?

740

How do you define "block" in HDFS?

724

Where is the Mapper Output intermediate kay-value data stored ?

1160

What is Distributed Cache?

716

What problems have you faced when you are working on Hadoop code?

803

What is HDFS - Hadoop Distributed File System?

758

What are the most commonly defined input formats in Hadoop?

845

What does /var/hadoop/pids do?

1072

What is the use of Combiner?

797

what is SPF?

1308

what are Task Tracker and Job Tracker?

814

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Un-Answered Questions { Apache Hadoop }

On What concept the Hadoop framework works?

993

What is the relation between job and task in hadoop?

459

Explain a simple Map/Reduce problem.

550

Why are the number of splits equal to the number of maps?

764

How to restart Namenode?

561

What is Distributed Cache?

716

Why is hadoop faster?

466

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

823

What are the port numbers of namenode, job tracker and task tracker?

528

What is the meaning of the term "non-DFS used" in Hadoop web-console?

1056

What are the additional benefits YARN brings in to Hadoop?

735

Is map like a pointer?

760

Name the examples of some companies that are using hadoop structure?

500

What do you know about nlineoutputformat?

506

What are active and passive "NameNodes"?

1189

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