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 3194

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

1150

What is a Record Reader in hadoop?

1005

What is version-id mismatch error in hadoop?

1081

how to share the metastore within multiple users?

959

How do you define "block" in HDFS?

958

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

1405

What is Distributed Cache?

935

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

1012

What is HDFS - Hadoop Distributed File System?

1002

What are the most commonly defined input formats in Hadoop?

1098

What does /var/hadoop/pids do?

1319

What is the use of Combiner?

1010

what is SPF?

1552

what are Task Tracker and Job Tracker?

1118

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Un-Answered Questions { Apache Hadoop }

what is a datanode?

969

Mention what is the number of default partitioner in Hadoop?

739

How many instances of a jobtracker run on hadoop cluster?

680

What is Safemode in Apache Hadoop?

770

What is the difference between Hadoop and Traditional RDBMS?

953

What is high availability in hadoop?

707

In cloudera there is already a cluster, but if I want to form a cluster on ubuntu can we do it?

773

Explain what is the purpose of RecordReader in Hadoop?

782

What do you know about nlineoutputformat?

730

How does master slave architecture in the hadoop?

872

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

1137

Define a combiner?

691

Mention what is the use of Context Object?

748

What is the difference between HDFS and NAS ?

1412

did you maintain the hadoop cluster in-house or used hadoop in the cloud?

1048

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