What is difference between regular file system and HDFS?

1058

---

What is rack-aware replica placement policy?

1027

---

Are Namenode and job tracker on the same host?

1457

---

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1107

---

What is HDFS Federation?

986

---

What are watches?

1033

---

Explain the Job OutputFormat?

961

---

Virtual Box & Ubuntu Installation?

991

---

What is the difference between HDFS and NAS ?

1372

---

How Mapper is instantiated in a running job?

994

---

Where do you specify the Mapper Implementation?

1020

---

What is the meaning of speculative execution in Hadoop? Why is it important?

1059

---

What is the InputFormat ?

1021

---

Command to format the NameNode?

937

---

Who is a 'user' in HDFS?

891

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