What is NoSQL?

876

---

What is Row Key?

939

---

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

820

---

What is IdentityMapper?

940

---

Why do we use Hadoop?

874

---

what is the typical block size of an HDFS block?

865

---

What is Hadoop Custom partitioner ?

952

---

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

1277

---

What stored in HDFS?

868

---

What is crontab? Explain with suitable example?

994

---

What is the difference between Hadoop and Traditional RDBMS?

879

---

What is Partioner in hadoop? Where does it run

925

---

Does Hadoop requires RAID?

894

---

What is the purpose of DataNode block scanner?

887

---

What is a checkpoint?

923

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