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Apache Hadoop Interview Questions
Questions Answers Views Company eMail

How to change from su to cloudera?

719

Why password is needed in ssh localhost?

801

What happens to a namenode, when job tracker is down?

752

What does the command mapred.job.tracker do?

777

How to come out of the insert mode?

787

What is the full form of fsck?

702

Why do we need a password-less ssh in fully distributed environment?

709

Can you give us some more details about ssh communication between masters and the slaves?

703

Can you tell us more about ssh?

716

How does master slave architecture in the hadoop?

815

Explain the wordcount implementation via hadoop framework ?

724

What is hadoop framework?

722

What is partioner in hadoop? Where does it run,mapper or reducer?

672

What is a task instance in hadoop? Where does it run?

615

How to enable recycle bin in hadoop?

766


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Un-Answered Questions { Apache Hadoop }

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

648


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

1032


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

955


Define a combiner?

647


How to resolve small file problem in hdfs?

980


Main Components of Hadoop?

769


What is the default block size in hdfs?

1041


Explain the wordcount implementation via hadoop framework ?

724


Did you ever ran into a lop sided job that resulted in out of memory error

1220


What is a speculative execution in Apache Hadoop MapReduce?

793


How to enable trash/recycle bin in hadoop?

738


How many instances of JobTracker can run on a Hadoop Cluser?

1022


What is the Use of SSH in Hadoop ?

959


what are the nodes in the Hadoop cluster?

1045


On what basis name node distribute blocks across the data nodes?

1060