Answer / Anuj Jaiswal

The NameNode in Hadoop is the central managing daemon responsible for maintaining the file system namespace, the FSImage and the EditLog. It manages the file system's namespace hierarchy and keeps track of all files and directories in the file system.

Can you give a detailed overview about the Big Data being generated by Facebook?

1 Answers  

---

What is the procedure for namenode recovery?

1 Answers  

---

According to IBM, what are the three characteristics of Big Data?

1 Answers  

---

What sorts of actions does the job tracker process perform?

1 Answers  

---

What is JPS? Why is it used in Hadoop?

1 Answers  

---

Explain InputSplit in Hadoop?

1 Answers  

---

How to do ‘map’ and ‘reduce’ works?

1 Answers  

---

What is the logistic regression?

1 Answers  

---

What is the use of cloudera?

1 Answers  

---

What is heartbeat in hadoop?

1 Answers  

---

How does hadoop achieve fault tolerance?

1 Answers  

---

How is security achieved in Hadoop?

1 Answers  

---