Give me the examples of Columnar database ?

530

---

What are 'slaves' and 'masters' in Hadoop?

382

---

What is Fault Tolerance?

498

---

What is the basic difference between traditional RDBMS and Hadoop?

409

---

What are the common types of NOSQL data bases ?

418

---

Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?

400

---

How does speculative execution work in Hadoop?

402

---

What is Federation?

387

---

What is the difference between TextInputFormat and KeyValueInputFormat class?

459

---

What is High Availability feature in Hadoop2?

408

---

What is the command to change the replication factor ?

453

---

What is JobTracker?

404

---

How many datanodes can run on a single Hadoop cluster?

409

---

What are some typical functions of Job Tracker?

404

---

What is TaskTracker?

450

---