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

501

How is hadoop different from other data processing tools?

496

What happens in a textinputformat?

486

Can you explain how do ‘map’ and ‘reduce’ work?

485

Can we call vms as pseudos?

501

What do the master class and the output class do?

497

What does job conf class do?

491

What do you know about keyvaluetextinputformat?

460

Define a namenode?

492

Explain the hadoop-core configuration?

511

Explain the benefits of block transfer?

629

Define a task tracker?

475

Define a metadata?

492

Define a daemon?

506

Explain the core components of hadoop?

493

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Un-Answered Questions { Apache Hadoop }

Why is hadoop faster?

472

What other technologies have you used in hadoop sta ck?

821

Which data storage components are used by hadoop?

481

What is the use of Combiner?

805

What is a speculative execution in Apache Hadoop MapReduce?

549

What are the modes in which Apache Hadoop run?

550

What are the most commonly defined input formats in Hadoop?

864

What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?

1065

Explain the features of fully distributed mode?

443

Define tasktracker.

488

What is the difference between hadoop and other data processing tools?

503

how is a file of the size 1 GB uncompressed

687

How would you use Map/Reduce to split a very large graph into smaller pieces and parallelize the computation of edges according to the fast/dynamic change of data?

521

what are Task Tracker and Job Tracker?

827

What is Safemode in Apache Hadoop?

499

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