What is the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?

851

---

What is Reducer in MapReduce?

736

---

How many Reducers run for a MapReduce job in Hadoop?

590

---

What is MapReduce in Hadoop?

643

---

Why Hadoop MapReduce?

670

---

Why can aggregation not be done in Mapper in MapReduce?

614

---

How to submit extra files(jars, static files) for MapReduce job during runtime?

676

---

How many numbers of reducers run in Map-Reduce Job?

610

---

What is MapReduce? What are the syntax you use to run a MapReduce program?

670

---

Explain slot in Hadoop Map-Reduce v1?

689

---

What happen if the number of the reducer is 0 in MapReduce?

652

---

What is the need of key-value pair to process the data in MapReduce?

668

---

What are the main configuration parameters in a MapReduce program?

642

---

What do you mean by shuffling and sorting in MapReduce?

702

---

What is Combiner in MapReduce?

646

---