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?

213

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

252

In what ways sparksession different from sparkcontext?

287

Explain fold() operation in spark?

256

Define sparkcontext in apache spark?

231

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

238

What is map in apache spark?

229

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

227

Define various running modes of apache spark?

241

What are the ways to run spark over hadoop?

258

What is catalyst query optimizer in apache spark?

244

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

235

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

250

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

254

What is speculative execution in spark?

280

Un-Answered Questions { Hadoop }

What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?

350

How does apache flume work?

109

Describe the run-time architecture of Spark?

244

What is pig properties?

425

What is hive on spark?

286

What is tunable consistency in Cassandra?

Does the hdfs client decide the input split or namenode?

515

What is a databricks cluster?

343

What is difference between map and flatmap in spark?

244

Command to format the NameNode?

768

Can you explain sqoop metastore?

What is spark in python?

240

What is apache flume used for?

What is dataproc cluster?

240

what is Memtable in Cassandra?

101

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