What is NoSQL?

924

---

What is Row Key?

987

---

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

853

---

What is IdentityMapper?

1009

---

Why do we use Hadoop?

927

---

what is the typical block size of an HDFS block?

916

---

What is Hadoop Custom partitioner ?

1004

---

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

1328

---

What stored in HDFS?

931

---

What is crontab? Explain with suitable example?

1064

---

What is the difference between Hadoop and Traditional RDBMS?

926

---

What is Partioner in hadoop? Where does it run

975

---

Does Hadoop requires RAID?

948

---

What is the purpose of DataNode block scanner?

968

---

What is a checkpoint?

976

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