What happens when a datanode fails ?

770

---

In Hadoop, which file controls reporting in Hadoop?

770

---

how can you debug Hadoop code?

834

---

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

783

---

What are the primary phases of a Reducer?

819

---

how indexing in HDFS is done?

853

---

What is the role of a MapReduce partitioner?

802

---

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

841

---

what job does the conf class do?

784

---

What is the key- value pair in Hadoop MapReduce?

675

---

What is InputFormat in Hadoop MapReduce?

661

---

What are the various InputFormats in Hadoop?

648

---

Explain InputSplit in Hadoop MapReduce?

669

---

How much space will the split occupy in Mapreduce?

670

---

What is a RecordReader in Hadoop MapReduce?

674

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