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?

248

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

297

In what ways sparksession different from sparkcontext?

330

Explain fold() operation in spark?

298

Define sparkcontext in apache spark?

301

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

289

What is map in apache spark?

260

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

255

Define various running modes of apache spark?

271

What are the ways to run spark over hadoop?

293

What is catalyst query optimizer in apache spark?

283

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

275

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

276

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

338

What is speculative execution in spark?

305

Un-Answered Questions { Hadoop }

What is bloom filter?

What is the use of ZooKeeper?

224

What are the components of a flume agent?

Can aluminum cause a spark?

304

Elaborate on CQL?

How kafka communicate with clients and servers?

495

What is the importance of — the split-by clause in running parallel import tasks in sqoop?

Is it possible to leverage real time analysis on the big data collected by flume directly? If yes, then explain how?

Replication causes data redundancy then why is pursued in hdfs?

Tell me about the types of hbase operations?

173

What is Disk Balancer in Hadoop?

464

Define parquet file format? How to convert data to parquet format?

312

What is impala?

130

What is the maximum recommended cell size?

167

Explain Reliability and Failure Handling in Apache Flume?

104

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