What is NoSQL?

916

---

What is Row Key?

977

---

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

849

---

What is IdentityMapper?

998

---

Why do we use Hadoop?

916

---

what is the typical block size of an HDFS block?

912

---

What is Hadoop Custom partitioner ?

989

---

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

1326

---

What stored in HDFS?

919

---

What is crontab? Explain with suitable example?

1051

---

What is the difference between Hadoop and Traditional RDBMS?

918

---

What is Partioner in hadoop? Where does it run

971

---

Does Hadoop requires RAID?

939

---

What is the purpose of DataNode block scanner?

944

---

What is a checkpoint?

962

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