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

Hadoop General Interview Questions

Questions Answers Views Company eMail

Ideally what should be the block size in hadoop?

421

What happen when namenode enters in safemode in hadoop?

391

What is partitioning?

426

Can we change the file cached by distributed cache

393

Why would nosql be better than using a sql database? And how much better is it?

449

Why we use intwritable instead of int? Why we use longwritable instead of long?

436

What happens if you don?t override the mapper methods and keep them as it is?

426

What are the side data distribution techniques?

438

Can we deploy job tracker other than name node?

647

Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?

404

How many maps are there in a particular job?

419

Can I set the number of reducers to zero?

375

Doesn’t google have its very own version of dfs?

433

What are the restriction to the key and value class ?

399

If we want to copy 10 blocks from one machine to another, but another machine can copy only 8.5 blocks, can the blocks be broken at the time of replication?

624

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Un-Answered Questions { Hadoop General }

What is Small File Problem in Hadoop? How can it be resolved?

490

What sorts of actions does the job tracker process perform?

380

What are the primary phases of the reducer?

426

Compare Hadoop 2 and Hadoop 3?

378

Can you give some examples of Big Data?

423

Can you explain logistic regression?

379

How many InputSplits will be made by hadoop framework?

457

Can you explain commodity hardware?

376

What is the most widely recognized info formats characterized in hadoop?

385

Can you explain edge nodes in hadoop?

401

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

391

Which directory does hadoop install to?

455

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

491

Can we use windows for hadoop?

440

What is the hadoop-core configuration?

434

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