What is NoSQL?

919

---

What is Row Key?

981

---

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

853

---

What is IdentityMapper?

1004

---

Why do we use Hadoop?

925

---

what is the typical block size of an HDFS block?

916

---

What is Hadoop Custom partitioner ?

997

---

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

1328

---

What stored in HDFS?

926

---

What is crontab? Explain with suitable example?

1057

---

What is the difference between Hadoop and Traditional RDBMS?

920

---

What is Partioner in hadoop? Where does it run

973

---

Does Hadoop requires RAID?

943

---

What is the purpose of DataNode block scanner?

961

---

What is a checkpoint?

966

---