What are the common types of NOSQL data bases ?

445

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

430

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How does speculative execution work in Hadoop?

433

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What is Federation?

414

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What is the difference between TextInputFormat and KeyValueInputFormat class?

497

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What is High Availability feature in Hadoop2?

440

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What is the command to change the replication factor ?

501

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What is JobTracker?

435

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How many datanodes can run on a single Hadoop cluster?

451

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What are some typical functions of Job Tracker?

426

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What is TaskTracker?

482

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Give a brief overview of Hadoop history?

415

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How Big is ‘Big Data’?

426

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

461

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

471

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