What is difference between regular file system and HDFS?

1097

---

What is rack-aware replica placement policy?

1068

---

Are Namenode and job tracker on the same host?

1493

---

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

1139

---

What is HDFS Federation?

1030

---

What are watches?

1066

---

Explain the Job OutputFormat?

1000

---

Virtual Box & Ubuntu Installation?

1048

---

What is the difference between HDFS and NAS ?

1420

---

How Mapper is instantiated in a running job?

1034

---

Where do you specify the Mapper Implementation?

1058

---

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

1088

---

What is the InputFormat ?

1064

---

Command to format the NameNode?

984

---

Who is a 'user' in HDFS?

941

---