What is difference between regular file system and HDFS?

1106

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What is rack-aware replica placement policy?

1070

---

Are Namenode and job tracker on the same host?

1496

---

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

1142

---

What is HDFS Federation?

1030

---

What are watches?

1071

---

Explain the Job OutputFormat?

1002

---

Virtual Box & Ubuntu Installation?

1048

---

What is the difference between HDFS and NAS ?

1422

---

How Mapper is instantiated in a running job?

1036

---

Where do you specify the Mapper Implementation?

1060

---

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

1092

---

What is the InputFormat ?

1066

---

Command to format the NameNode?

986

---

Who is a 'user' in HDFS?

941

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