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

Hadoop General Interview Questions

Questions Answers Views Company eMail

Give me the examples of Columnar database ?

534

What are 'slaves' and 'masters' in Hadoop?

384

What is Fault Tolerance?

500

What is the basic difference between traditional RDBMS and Hadoop?

411

What are the common types of NOSQL data bases ?

420

Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?

406

How does speculative execution work in Hadoop?

406

What is Federation?

390

What is the difference between TextInputFormat and KeyValueInputFormat class?

465

What is High Availability feature in Hadoop2?

410

What is the command to change the replication factor ?

461

What is JobTracker?

408

How many datanodes can run on a single Hadoop cluster?

412

What are some typical functions of Job Tracker?

406

What is TaskTracker?

455

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Un-Answered Questions { Hadoop General }

Can you explain record reader?

404

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

411

What are the hadoop configuration files at present?

432

Can you explain speculative execution?

397

What are the port numbers of namenode?

392

What are configuration files in Hadoop?

479

Explain what is namenode in hadoop?

409

What is throughput in Hadoop?

501

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

401

Why aggregation cannot be done in Mapper?

531

Is nosql follow relational db model?

425

How often do you need to reformat the namenode?

486

What does secondary name-node means?

400

Name the most common input formats defined in hadoop?

414

What mode(s) can hadoop code be run in?

425

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