What is NoSQL?

966

---

What is Row Key?

1033

---

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

888

---

What is IdentityMapper?

1049

---

Why do we use Hadoop?

964

---

what is the typical block size of an HDFS block?

956

---

What is Hadoop Custom partitioner ?

1047

---

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

1358

---

What stored in HDFS?

973

---

What is crontab? Explain with suitable example?

1097

---

What is the difference between Hadoop and Traditional RDBMS?

960

---

What is Partioner in hadoop? Where does it run

1024

---

Does Hadoop requires RAID?

996

---

What is the purpose of DataNode block scanner?

1015

---

What is a checkpoint?

1013

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