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 standalone mode in spark cluster?

283

Explain apache spark streaming? How is the processing of streaming data achieved in apache spark?

318

In what ways sparksession different from sparkcontext?

360

Explain fold() operation in spark?

319

Define sparkcontext in apache spark?

325

List out the various advantages of dataframe over rdd in apache spark?

319

What is map in apache spark?

287

Write the command to start and stop the spark in an interactive shell?

284

Define various running modes of apache spark?

305

What are the ways to run spark over hadoop?

326

What is catalyst query optimizer in apache spark?

306

What are the various types of shared variable in apache spark?

309

Define the common faults of the developer while using apache spark?

306

What is the use of spark driver, where it gets executed on the cluster?

394

What is speculative execution in spark?

344

Un-Answered Questions { Hadoop }

What is difference between scala and spark?

331

In Hadoop, which file controls reporting in Hadoop?

821

Use of list-databases command in hadoop sqoop?

What is spark written?

348

What is replication in kafka?

542

What is a "Parquet" in Spark?

336

Explain HCatalog Create Table CLI along with its syntax?

what factors the block size takes before creation?

1091

What is transformation in spark?

341

What is client mode in spark?

335

Is apache spark a framework?

288

Why replication is required in Kafka?

544

What is the significance of using –compress-codec parameter?

What is spark application?

380

Explain schemardd?

370

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