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’?

427

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?

508

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?

448

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 }

What are the different commands used to startup and shutdown Hadoop daemons?

527

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

420

What are the Features of Hadoop?

511

Explain the common input formats in hadoop?

467

What is the difference between a hadoop database and relational database?

453

Is it possible to have hadoop job output in multiple directories?

444

Give a brief overview of Hadoop history?

418

Give me the examples of Columnar database ?

586

What are the tools used in big data?

434

What do you understand by unit and ()in scala?

494

What are the port numbers of namenode?

425

Mention what is the difference between an rdbms and hadoop?

424

Clarify what a task tracker is in hadoop?

427

Web-ui shows that half of the datanodes are in decommissioning mode. What does that mean? Is it safe to remove those nodes from the network?

445

Why do we need Hadoop Archives? How is it created?

564

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