What are the different commands used to startup and shutdown Hadoop daemons?

583

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What is configured in /etc/hosts and what is its role in setting Hadoop cluster?

579

---

How is the splitting of file invoked in Hadoop framework?

562

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Is it possible to provide multiple input to Hadoop? If yes then how?

542

---

Is it possible to have hadoop job output in multiple directories? If yes, how?

489

---

What is the default replication factor and how will you change it?

576

---

Explain Hadoop Archives?

581

---

Explain the Single point of Failure in Hadoop?

509

---

Explain Erasure Coding in Hadoop?

542

---

What is Disk Balancer in Hadoop?

564

---

How would you check whether your NameNode is working or not?

445

---

Is Namenode machine same as DataNode machine as in terms of hardware?

505

---

If DataNode increases, then do we need to upgrade NameNode?

583

---

What happens if the number of reducers is 0 in Hadoop?

511

---

Why is Data Block size set to 128 MB in Hadoop?

469

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