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

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

Explain why do we need hadoop?

617

Explain the features of pseudo mode?

655

What do shuffling do?

620

Explain the basic difference between traditional rdbms and hadoop?

614

Explain what if rack 2 and datanode fails?

588

Define a job tracker?

639

Explain the features of fully distributed mode?

577

What are the characteristics of hadoop framework?

616

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

594

Explain how is hadoop different from other data processing tools?

679

Define a datanode?

592

Is secondary namenode a substitute to the namenode?

626

What is a secondary namenode?

576

What is unstructured data?

601

Explain the overview of hadoop history breifly?

565

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Un-Answered Questions { Apache Hadoop }

Who invented hadoop?

632

How to enable recycle bin or trash in hadoop?

648

What is Apache Hadoop YARN?

1416

what is the typical block size of an HDFS block?

864

What are the problems with Hadoop 1.0?

991

How can we look for the namenode in the browser?

671

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

594

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

622

What if a namenode has no data?

625

What do shuffling do?

620

What are the additional benefits YARN brings in to Hadoop?

888

What is the main purpose of HDFS fsck command?

1717

Define a commodity hardware? Does commodity hardware include ram?

699

How would you tackle counting words in several text documents?

979

What is the use of Combiner?

929

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