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 is pseudo-distributed mode?

576

When we send a data to a node, do we allow settling in time, before sending another data to that node?

448

Can we write map reduce program in other than java programming language. How?

462

Are job tracker and task trackers present in separate machines?

442

What is namenode?

453

what if job tracker machine is down?

446

What are the four basic parameters of a mapper?

530

In which location name node sores its metadata and why?

652

What are input format, input split & record reader and what they do?

579

How namenode handles data node failures?

502

What is the non dfs used?

514

How can one write custom record reader?

456

Whats the default port that jobtrackers listens ?

452

Do we need to place 2nd and 3rd data in rack 2 only?

421

Is nosql follow relational db model?

425

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Un-Answered Questions { Hadoop General }

How NameNode tackle Datanode failures in Hadoop?

442

Do we require two servers for the namenode and the datanodes?

495

Explain small file problem in hadoop

400

What is Slot in Hadoop v1? Why was it removed from Hadoop v2?

478

What does rack awareness algorithm means and why is it utilized as a part of hadoop?

390

What are the features of Standalone (local) mode?

554

Explain the Single point of Failure in Hadoop?

445

What is Disk Balancer in Hadoop?

464

Can we deploye job tracker other than name node?

632

How ordering in hdfs is finished?

400

What is the number of default partitioner in hadoop?

418

What do you mean by the NameNode High Availability in hadoop?

470

Explain how can you check whether namenode is working beside using the jps command?

404

What is the key difference between NameNode and DataNode in Hadoop?

456

Can we use windows for hadoop?

452

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