explain Metadata in Namenode?

943

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What is a 'block' in HDFS?

984

---

What is Derby database?

921

---

How many Daemon processes run on a Hadoop system?

1114

---

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

963

---

How the Client communicates with HDFS?

1071

---

What is NoSQL?

927

---

What is Row Key?

1012

---

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

859

---

What is IdentityMapper?

1013

---

Why do we use Hadoop?

942

---

what is the typical block size of an HDFS block?

931

---

What is Hadoop Custom partitioner ?

1015

---

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

1336

---

What stored in HDFS?

941

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