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

Hadoop General Interview Questions

Questions Answers Views Company eMail

Can you define a checkpoint?

431

Which language is more suitable for text analytics? R or python?

402

Can you explain commodity hardware?

376

How can native libraries be included in yarn jobs?

438

How to do ‘map’ and ‘reduce’ works?

513

Can you explain bloommapfile.

427

Why is checkpointing important in hadoop?

430

What happens when two clients try to access the same file in the hdfs?

424

What do you know about the speculative execution?

422

What are the differences between hadoop 1 and hadoop 2?

394

Why do the nodes are removed and added frequently in a hadoop cluster?

439

What is a namenode?

363

Can hadoop handle streaming data?

426

What is hadoop? Name the main components of a hadoop application?

409

What do you know about yarn?

379

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Un-Answered Questions { Hadoop General }

If datanodes increase, then do we need to upgrade namenode?

424

While starting hadoop services, datanode service is not running?

406

Explain InputSplit in Hadoop?

434

What are configuration files in Hadoop?

474

Clarify what is sequence file input format?

487

Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?

403

Explain small file problem in hadoop

394

After increasing the replication level, I still see that data is under replicated. What could be wrong?

422

What are the common types of NOSQL data bases ?

414

What type of data hadoop can handle ?

381

Can we use windows for hadoop?

440

What is NameNode? How NameNode tackle Datanode failures in Hadoop?

439

How can native libraries be included in yarn jobs?

438

Is it possible to rename the output file, and if so, how?

427

Clarify what is sqoop in hadoop?

387

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