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Hadoop Interview Questions
Questions Answers Views Company eMail

When to use coalesce and repartition in spark?

321

Can spark work without hadoop?

336

Can a spark cause a fire?

332

What is scala and spark?

273

Why is spark popular?

280

What causes sparks?

295

Do streamers make money from sparks?

282

Why scala is used in spark?

330

Does spark use zookeeper?

279

Which is better hadoop or spark?

292

Is spark a language?

282

Is spark good for machine learning?

310

What is spark rdd?

293

Does google use spark?

282

How is spark different from hadoop?

298


Un-Answered Questions { Hadoop }

Is it necessary to write a mapreduce job in java?

634


Explain HCatLoader and HCatStorer APIs?

5


Mention what is the hadoop mapreduce apis contract for a key and value class?

697


What is the difference between apache mahout and spark mllib ?

57


What is the roadmap for apache driver version one.0?

23


Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?

622


Compare Apache Hadoop and Apache Spark?

455


Explain avrostorage function?

632


What are the DDL commands used in hbase?

154


Which classes are used by the hive to read and write hdfs files?

72


What is the benifit of Distributed cache, why can we just have the file in HDFS and have the application read it?

47


Are Namenode and job tracker on the same host?

1462


What is the heartbeat used for?

1054


What is the key difference between textfile and wholetextfile method?

266


Explain the process that overwrites the replication factors in HDFS?

57