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

Hadoop General Interview Questions

Questions Answers Views Company eMail

Which port does SSH work on?

302

Is there another way to check whether Namenode is working?

291

What is the NameNode port number?

293

Give me an example of document database ?

334

What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?

332

What are the four modules that make up the Apache Hadoop framework?

429

How does job tracker schedule a job for the task tracker?

338

What is 'jps'?

309

Explain about Hadoop file system and processing framework?

308

How Hadoop is cost-effective?

299

What does the mapred.job.tracker command do?

314

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

344

What are the Hadoop features extended to its eco-system components ?

318

What is job tracker in Hadoop?

358

What sorts of actions does the job tracker process perform?

301

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Un-Answered Questions { Hadoop General }

What happen if number of reducer is set to 0 in Hadoop?

331

Can you explain edge nodes in hadoop?

316

Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

340

Compare Apache Hadoop and Apache Spark?

298

What are the functionalities of jobtracer?

299

what is next step after mapper or maptask?

305

Explain what is a sequence file in hadoop?

337

What is Erasure Coding in Hadoop?

298

How many InputSplits will be made by hadoop framework?

331

What is the procedure for namenode recovery?

302

Explain what happens in text format?

408

What is Disk Balancer in Hadoop?

300

What are the Hadoop features extended to its eco-system components ?

318

What is a commodity hardware? Does commodity hardware include RAM?

331

Why can we not create directory /user/dataflair/inpdata001 when name node is in safe mode?

321

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