Apache Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

How to change from su to cloudera?

719

Why password is needed in ssh localhost?

798

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

749

What does the command mapred.job.tracker do?

776

How to come out of the insert mode?

785

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?

702

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?

719

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

671

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

615

How to enable recycle bin in hadoop?

765

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Un-Answered Questions { Apache Hadoop }

How can we check whether namenode is working or not?

659

How to enable/configure the compression of map output data in hadoop?

766

What do you know about keyvaluetextinputformat?

600

Explain what is the purpose of RecordReader in Hadoop?

745

What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?

1112

What is the main purpose of HDFS fsck command?

1792

What is Rack awareness?

998

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

667

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

954

What are the default configuration files that are used in hadoop?

691

Is hadoop obsolete?

633

What is the difference between SQL and NoSQL?

1077

Mention what is the use of Context Object?

721

What are the modes in which Apache Hadoop run?

800

Which are the two types of 'writes' in HDFS?

1219

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