Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

What is the difference between coalesce and repartition in spark?

333

What does rdd mean?

331

How does groupbykey work in spark?

311

What is tungsten in spark?

425

What is the difference between dataframe and dataset in spark?

304

What is an accumulator in spark?

316

What is apache spark used for?

326

What is the difference between spark and scala?

366

What is accumulators and broadcast variables in spark?

337

Does spark run hadoop?

314

What is coalesce in spark sql?

327

What are the features of spark rdd?

306

What is cluster mode in spark?

331

What are shared variables in spark?

319

What is the future of apache spark?

298

Un-Answered Questions { Hadoop }

What are common spark ecosystems?

336

Define Writable data types in Hadoop MapReduce?

683

What is the meaning of compaction in hbase?

169

What is prepare() method in Cassandra?

What is a shuffle block in spark?

291

Define a commodity hardware? Does commodity hardware include ram?

774

Which language is best for spark?

276

Which java class handles the output record encoding into files which result from Hive queries?

703

What are the restriction to the key and value class ?

463

What is the Hadoop MapReduce API contract for a key and value Class?

1347

How will you design or modify schema in hbase programmatically?

159

What kind of music is flume?

Can kafka be utilized without zookeeper?

556

Name some independent extensions that contribute to the Ambari codebase?

What is anti-entropy and how is it associated with merkel tree?

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