What is NoSQL?

926

---

What is Row Key?

989

---

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

856

---

What is IdentityMapper?

1012

---

Why do we use Hadoop?

929

---

what is the typical block size of an HDFS block?

919

---

What is Hadoop Custom partitioner ?

1005

---

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

1329

---

What stored in HDFS?

934

---

What is crontab? Explain with suitable example?

1066

---

What is the difference between Hadoop and Traditional RDBMS?

926

---

What is Partioner in hadoop? Where does it run

975

---

Does Hadoop requires RAID?

952

---

What is the purpose of DataNode block scanner?

972

---

What is a checkpoint?

980

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