Can you explain rack awareness?

400

---

Can you explain record reader?

404

---

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

425

---

What are the main components of hadoop?

402

---

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

457

---

Can you define udf?

399

---

What is the difference between an inputsplit and a block?

589

---

What is the purpose of context object?

399

---

Can you explain sequence file in hadoop?

382

---

What is the use of recordreader in hadoop?

399

---

What is data cleansing?

429

---

What is the number of default partitioner in hadoop?

420

---

Can you explain hadoop streaming?

388

---

List out some common problems faced by data analyst?

425

---

What is job tracker role in hadoop?

432

---