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

Hadoop General Interview Questions

Questions Answers Views Company eMail

How often DataNode send heartbeat to NameNode in Hadoop?

536

What is Mapper? How can we compress Mapper output in Hadoop?

519

What is Rack Awareness? What is its need in Hadoop?

532

What is Erasure Coding in Hadoop?

507

Why do we need Hadoop Archives? How is it created?

563

What is Slot in Hadoop v1? Why was it removed from Hadoop v2?

515

What is CAP Theorem? What aspects does Hadoop support from this theorem?

473

Why do we need Hadoop?

520

What are the core components of Hadoop?

508

What are the Features of Hadoop?

511

Compare Hadoop and RDBMS?

410

What are the modes in which Hadoop run?

504

What are the features of Standalone (local) mode?

596

What are the features of Pseudo mode?

503

What are the features of Fully-Distributed mode?

492

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Un-Answered Questions { Hadoop General }

Can we write map reduce program in other than java programming language. How?

499

Ideally what should be the block size in hadoop?

461

What are the core components of Hadoop?

508

What is the NameNode port number?

400

What are some typical functions of Job Tracker?

428

What is the default replication factor and how will you change it?

533

What is check pointing in hadoop?

441

Which database is used in hadoop?

481

Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

505

Explain how can you debug hadoop code?

466

Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

428

What are the hadoop configuration files at present?

476

Clarify what a task tracker is in hadoop?

427

What are the modes in which Hadoop run?

504

How to use combiner in hadoop ?

445

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