Explain map-only job?

523

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What is KeyValueTextInputFormat in Hadoop?

529

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What happen if number of reducer is set to 0 in Hadoop?

493

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What is TextInputFormat in Hadoop?

514

---

What is purpose of RecordWriter in Hadoop?

506

---

What are the most common OutputFormat in Hadoop?

549

---

What is LazyOutputFormat in Hadoop?

495

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What is Identity reducer?

518

---

What is Chain Mapper?

556

---

What are the core methods of a Reducer?

509

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What are the parameters of mappers and reducers?

489

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What is the difference between TextinputFormat and KeyValueTextInputFormat class?

508

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How is the splitting of file invoked in Hadoop ?

532

---

How many InputSplits will be made by hadoop framework?

492

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Explain the usage of Context Object?

476

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