explain Metadata in Namenode?

917

---

What is a 'block' in HDFS?

976

---

What is Derby database?

902

---

How many Daemon processes run on a Hadoop system?

1101

---

What are the limitations of importing RDBMS tables into Hcatalog directly?

944

---

How the Client communicates with HDFS?

1063

---

What is NoSQL?

922

---

What is Row Key?

982

---

What is a Task instance in Hadoop? Where does it run?1

853

---

What is IdentityMapper?

1005

---

Why do we use Hadoop?

925

---

what is the typical block size of an HDFS block?

916

---

What is Hadoop Custom partitioner ?

1002

---

What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?

1328

---

What stored in HDFS?

927

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