Illustrate a simple example of the working of MapReduce.

684

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

713

---

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

742

---

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

710

---

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

689

---

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

768

---

how Hadoop is different from other data processing tools?

701

---

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

646

---

what is a sequence file in Hadoop?

734

---

What are the key differences between Pig vs MapReduce?

659

---

When is it not recommended to use MapReduce paradigm for large

692

---

what happens in textinformat ?

714

---

Explain the differences between a combiner and reducer

725

---

What is a TaskInstance?

712

---

What is the default input type in MapReduce?

719

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