Explain how do you overwrite replication factor?

460

What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?

480

How ordering in hdfs is finished?

471

What are the port numbers of namenode?

466

What is active and passive NameNode in Hadoop?

501

What is the difference between TextInputFormat and KeyValueInputFormat class?

540

What is Chain Mapper?

599

Explain what is jobtracker in hadoop? What are the actions followed by hadoop?

446

What is distributed copy (distcp)?

520

Why slaves limited to 4000 in hadoop version 1?

533

is there a standard procedure to deploy hadoop?

457

What is Disk Balancer in Hadoop?

564

List some use cases where classification machine learning algorithms can be used.

495

Why Hadoop performs replication, although it results in data redundancy?

1308

What happens when two clients try to access the same file in the hdfs?

501