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 a brief overview of Hadoop history?

418

How Big is ‘Big Data’?

426

How can you set an arbitrary number of mappers to be created for a job in Hadoop?

461

How many job tracker processes can run on a single Hadoop cluster?

474

What are some of the characteristics of Hadoop framework?

438

Where are Hadoop’s configuration files located?

507

Can you give a detailed overview about the Big Data being generated by Facebook?

432

In hadoop_pid_dir, what does pid stands for?

524

What are the network requirements for hadoop?

474

What does hadoop-env.sh do?

446

Which are the three modes in which hadoop can be run?

478

Where is hadoop-env.sh file present?

484

Can we use windows for hadoop?

477

What are the hadoop configuration files at present?

476

Can we create a hadoop cluster from scratch?

436

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Un-Answered Questions { Hadoop General }

Mention what job does the conf class do?

422

Can you explain logistic regression?

411

What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?

444

What happen if a datanode loses network connection for a few minutes?

589

What is KeyValueTextInputFormat in Hadoop?

529

How ordering in hdfs is finished?

424

What webdav is in hadoop?

437

Can we change the file cached by distributed cache

428

What is the problem with small files in Hadoop?

526

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

454

How often do you need to reformat the namenode?

511

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

489

Which object can be used to get the progress of a particular job

470

Clarify what is sqoop in hadoop?

419

Clarify what is sequence file input format?

528

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