Explain map-only job?

529

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What is KeyValueTextInputFormat in Hadoop?

538

---

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

501

---

What is TextInputFormat in Hadoop?

528

---

What is purpose of RecordWriter in Hadoop?

514

---

What are the most common OutputFormat in Hadoop?

555

---

What is LazyOutputFormat in Hadoop?

505

---

What is Identity reducer?

530

---

What is Chain Mapper?

566

---

What are the core methods of a Reducer?

517

---

What are the parameters of mappers and reducers?

498

---

What is the difference between TextinputFormat and KeyValueTextInputFormat class?

512

---

How is the splitting of file invoked in Hadoop ?

542

---

How many InputSplits will be made by hadoop framework?

496

---

Explain the usage of Context Object?

485

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