Can you explain rack awareness?

440

---

Can you explain record reader?

439

---

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

456

---

What are the main components of hadoop?

437

---

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

505

---

Can you define udf?

434

---

What is the difference between an inputsplit and a block?

636

---

What is the purpose of context object?

435

---

Can you explain sequence file in hadoop?

414

---

What is the use of recordreader in hadoop?

425

---

What is data cleansing?

459

---

What is the number of default partitioner in hadoop?

442

---

Can you explain hadoop streaming?

424

---

List out some common problems faced by data analyst?

461

---

What is job tracker role in hadoop?

486

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