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

Hadoop General Interview Questions

Questions Answers Views Company eMail

What do you understand by a closure in scala?

488

Can you explain textinformat?

497

List some use cases where classification machine learning algorithms can be used.

463

How many daemon processes run on a hadoop cluster?

457

Which scala library is used for functional programming?

461

Suppose hadoop spawned 100 tasks for a job and one of the tasks failed. What will hadoop do?

482

Which operating system(s) are supported for production hadoop deployment?

428

Can you explain speculative execution?

418

How do you overwrite replication factor?

445

Can you explain logistic regression?

412

Can you explain combiner?

437

List of some best tools that can be useful for data-analysis?

431

What is the best practice to deploy the secondary name node?

454

What are the tools used in big data?

434

Can you explain indexing?

414

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Un-Answered Questions { Hadoop General }

What is the role of the secondary namenode?

441

List out some common problems faced by data analyst?

450

How would you check whether your NameNode is working or not?

420

Can you explain record reader?

431

After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?

473

What is distributed copy (distcp)?

482

Give a brief overview of Hadoop history?

418

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

431

What is rack awareness in hadoop?

487

When should be hadoop archive create?

429

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

445

what happens when namenode goes down during file read operation in hadoop?

591

List out the different stream grouping in apache storm?

383

What is KeyValueTextInputFormat in Hadoop?

529

How to do ‘map’ and ‘reduce’ works?

572

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