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

657

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

695

---

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

668

---

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

636

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

714

---

how Hadoop is different from other data processing tools?

650

---

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

602

---

what is a sequence file in Hadoop?

677

---

What are the key differences between Pig vs MapReduce?

613

---

When is it not recommended to use MapReduce paradigm for large

650

---

what happens in textinformat ?

669

---

Explain the differences between a combiner and reducer

662

---

What is a TaskInstance?

669

---

What is the default input type in MapReduce?

666

---

Which directory does hadoop install to?

489

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