Can you explain rack awareness?

435

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Can you explain record reader?

439

---

What are the side effects of not running a secondary name node?

450

---

What are the main components of hadoop?

432

---

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

495

---

Can you define udf?

427

---

What is the difference between an inputsplit and a block?

635

---

What is the purpose of context object?

431

---

Can you explain sequence file in hadoop?

407

---

What is the use of recordreader in hadoop?

421

---

What is data cleansing?

457

---

What is the number of default partitioner in hadoop?

441

---

Can you explain hadoop streaming?

420

---

List out some common problems faced by data analyst?

455

---

What is job tracker role in hadoop?

475

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