What are the benefits yarn brings in to hadoop?

305

Why is checkpointing important in hadoop?

319

How will you write a custom partitioner for a Hadoop job?

326

What are the important features of hadoop?

312

Give me the examples of Columnar database ?

349

Explain InputSplit in Hadoop?

320

Can you explain sequence file in hadoop?

310

What are some typical functions of Job Tracker?

316

Tell me some major benefits of Hadoop?

299

If we want to copy 10 blocks from one machine to another, but another machine can copy only 8.5 blocks, can the blocks be broken at the time of replication?

529

What are the core components of Hadoop?

311

How can you set an arbitrary number of mappers to be created for a job in Hadoop?

345

What do you know about the speculative execution?

297

How can one check whether NameNode is working or not?

372

What are input format, input split & record reader and what they do?

433