Answer / Mrigendra Singh

The Hadoop MapReduce Context object is used by mapper and reducer classes to access various information about the job, such as the configuration parameters, output path, progress reporter, etc. It provides a set of methods that help in writing data to the output, setting configuration properties, getting input splits, and communicating with the framework.

What does secondary name-node means?

1 Answers  

---

Why Hadoop performs replication, although it results in data redundancy?

1 Answers  

---

What is the difference between namenode and datanode in hadoop?

1 Answers  

---

Can you define inputsplit in hadoop?

1 Answers  

---

After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?

1 Answers  

---

Can we create a hadoop cluster from scratch?

1 Answers  

---

What is Slot in Hadoop v1? Why was it removed from Hadoop v2?

1 Answers  

---

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

1 Answers  

---

What are the major differences between Hadoop 2 and Hadoop 3?

1 Answers  

---

What does rack awareness mean?

1 Answers  

---

What is Distributed Cache in Hadoop?

1 Answers  

---

How do you overwrite replication factor?

1 Answers  

---