What is commodity hardware?

390

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Explain what is sqoop in Hadoop ?

437

---

Explain how do ‘map’ and ‘reduce’ works?

433

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Explain what is the purpose of RecordReader in Hadoop?

441

---

How to restart Namenode?

457

---

Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?

486

---

Mention what are the data components used by Hadoop?

394

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What does /etc /init.d do?

427

---

What is a Combiner?

426

---

Main Components of Hadoop?

446

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What are the four characteristics of Big Data?

444

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Mention what is the number of default partitioner in Hadoop?

432

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Explain what happens in textinformat ?

491

---

What is Hadoop serialization?

401

---

Explain a simple Map/Reduce problem.

445

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