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?

510

Explain the features of pseudo mode?

538

What do shuffling do?

481

Explain the basic difference between traditional rdbms and hadoop?

504

Explain what if rack 2 and datanode fails?

464

Define a job tracker?

521

Explain the features of fully distributed mode?

452

What are the characteristics of hadoop framework?

495

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

490

Explain how is hadoop different from other data processing tools?

555

Define a datanode?

495

Is secondary namenode a substitute to the namenode?

525

What is a secondary namenode?

480

What is unstructured data?

501

Explain the overview of hadoop history breifly?

469

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Un-Answered Questions { Apache Hadoop }

Explain the wordcount implementation via hadoop framework ?

530

How to exit the vi editor?

534

What is Writable & WritableComparable interface?

782

What is IdentityMapper?

787

What is salary of hadoop developer?

536

Explain Erasure Coding in Apache Hadoop?

542

Explain the hadoop-core configuration?

524

Can we have multiple entries in the master files?

536

Is fs.mapr.working.dir a single directory?

518

explain Metadata in Namenode?

733

Which files are used by the startup and shutdown commands?

509

Name the various types of lists supported by bootstrap.

509

what is a datanode?

760

What are the stable versions of Hadoop?

826

What are the steps to submit a Hadoop job?

741

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