What is commodity hardware?

712

---

Explain what is sqoop in Hadoop ?

775

---

Explain how do ‘map’ and ‘reduce’ works?

782

---

Explain what is the purpose of RecordReader in Hadoop?

790

---

How to restart Namenode?

802

---

Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?

802

---

Mention what are the data components used by Hadoop?

695

---

What does /etc /init.d do?

738

---

What is a Combiner?

798

---

Main Components of Hadoop?

820

---

What are the four characteristics of Big Data?

765

---

Mention what is the number of default partitioner in Hadoop?

751

---

Explain what happens in textinformat ?

787

---

What is Hadoop serialization?

748

---

Explain a simple Map/Reduce problem.

786

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