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 Rack awareness?

1035

How will format the HDFS ?

1112

what are the steps involved in commissioning adding

940

How to use Apache Zookeeper command line interface?

1193

Can NameNode and DataNode be a commodity hardware?

1724

What are the steps to submit a Hadoop job?

949

What is the heartbeat used for?

1077

How would you tackle counting words in several text documents?

1054

What are the Basics of Hadoop?

963

Explain the shuffle?

952

How blocks are distributed among all data nodes for a particular chunk of data?

1147

How can I install Cloudera VM in my system?

1007

How we can take Hadoop out of Safe Mode?

IBM,

890

What is Writable & WritableComparable interface?

957

What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?

1108

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Un-Answered Questions { Apache Hadoop }

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

709

What are the modes in which Apache Hadoop run?

829

how can we change Replication Factor?

1068

Does Hadoop requires RAID?

985

What is the port number for NameNode

881

What is a secondary namenode?

668

What is rack-aware replica placement policy?

1060

What alternate way does HDFS provides to recover data in case a Namenode

987

Is hadoop based on google mapreduce?

726

Who is a 'user' in HDFS?

931

On What concept the Hadoop framework works?

1229

What platform and java version are required to run hadoop?

726

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

1006

what is meaning Replication factor?

987

How Mapper is instantiated in a running job?

1029

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