Can you explain rack awareness?

432

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Can you explain record reader?

431

---

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

448

---

What are the main components of hadoop?

432

---

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

488

---

Can you define udf?

422

---

What is the difference between an inputsplit and a block?

624

---

What is the purpose of context object?

429

---

Can you explain sequence file in hadoop?

401

---

What is the use of recordreader in hadoop?

419

---

What is data cleansing?

449

---

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?

450

---

What is job tracker role in hadoop?

464

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