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

489

What is a commodity hardware? Does commodity hardware include RAM?

554

Doesn’t google have its very own version of dfs?

523

What is the purpose of RecordReader in hadoop?

518

Explain how can you debug hadoop code?

503

What a task tracker is in hadoop?

476

Can we deploye job tracker other than name node?

691

Explain the core methods of the reducer?

542

What are some typical functions of job tracker in hadoop?

474

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

495

Explain the difference between an inputsplit and a block?

461

What does jps command do in Hadoop?

700

Explain what is sequencefileinputformat?

490

Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?

490

What does secondary name-node means?

477