What happens when a datanode fails ?

727

---

In Hadoop, which file controls reporting in Hadoop?

742

---

how can you debug Hadoop code?

787

---

For a job in Hadoop, is it possible to change the number of mappers to be created?

735

---

What are the primary phases of a Reducer?

767

---

how indexing in HDFS is done?

813

---

What is the role of a MapReduce partitioner?

771

---

Is it important for Hadoop MapReduce jobs to be written in Java?

777

---

what job does the conf class do?

744

---

What is the key- value pair in Hadoop MapReduce?

632

---

What is InputFormat in Hadoop MapReduce?

615

---

What are the various InputFormats in Hadoop?

610

---

Explain InputSplit in Hadoop MapReduce?

624

---

How much space will the split occupy in Mapreduce?

635

---

What is a RecordReader in Hadoop MapReduce?

636

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