Illustrate a simple example of the working of MapReduce.

626

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For a Hadoop job, how will you write a custom partitioner?

647

---

what happens when Hadoop spawned 50 tasks for a job and one of the task failed?

687

---

what is the Hadoop MapReduce APIs contract for a key and value class?

666

---

When is it suggested to use a combiner in a MapReduce job?

631

---

What is the process of changing the split size if there is limited storage space on Commodity Hardware?

702

---

how Hadoop is different from other data processing tools?

644

---

List the configuration parameters that have to be specified when running a MapReduce job.

598

---

what is a sequence file in Hadoop?

675

---

What are the key differences between Pig vs MapReduce?

609

---

When is it not recommended to use MapReduce paradigm for large

630

---

what happens in textinformat ?

661

---

Explain the differences between a combiner and reducer

646

---

What is a TaskInstance?

660

---

What is the default input type in MapReduce?

655

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