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 2655

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

923

What is a Record Reader in hadoop?

812

What is version-id mismatch error in hadoop?

889

how to share the metastore within multiple users?

759

How do you define "block" in HDFS?

736

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

1180

What is Distributed Cache?

734

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

823

What is HDFS - Hadoop Distributed File System?

792

What are the most commonly defined input formats in Hadoop?

896

What does /var/hadoop/pids do?

1096

What is the use of Combiner?

817

what is SPF?

1328

what are Task Tracker and Job Tracker?

838

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Un-Answered Questions { Apache Hadoop }

How can you overwrite the replication factors in HDFS?

1057

Define a datanode?

495

What is version-id mismatch error in hadoop?

889

What are the site-specific configuration files in Hadoop?

864

What is zookeeper in hadoop?

477

What are the modules that constitute the Apache Hadoop 2.0 framework?

822

What are the basic available commands in Hadoop sqoop ?

806

What is the function of NodeManager?

765

What do you mean by taskinstance?

525

Who is a 'user' in HDFS?

763

Explain how can we change the split size if our commodity hardware has less storage space?

488

Explain how do ‘map’ and ‘reduce’ works?

564

What do shuffling do?

481

What platform and java version are required to run hadoop?

512

what is the typical block size of an HDFS block?

757

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