When the reducers are are started in a mapreduce job?

657

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Where the mapper's intermediate data will be stored?

686

---

Which are the methods in the mapper interface?

690

---

What is a namenode? How many instances of namenode run on a hadoop cluster?

697

---

What do you mean by taskinstance?

803

---

How hdfa differs with nfs?

791

---

How a task is scheduled by a jobtracker?

720

---

How many maximum jvm can run on a slave node?

730

---

What are the two main parts of the hadoop framework?

707

---

What is the use of combiners in the hadoop framework?

654

---

What is the jobtracker?

680

---

What is the jobtracker and what it performs in a hadoop cluster?

670

---

How many instances of tasktracker run on a hadoop cluster?

732

---

Explain the use of tasktracker in the hadoop cluster?

683

---

How does a namenode handle the failure of the data nodes?

739

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