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 are the ways in which one can know that the given operation is transformation or action?

283

Describe join() operation. How is outer join supported?

295

What is the method to create a data frame?

319

On what all basis can you differentiate rdd, dataframe, and dataset?

305

How can you manually partition the rdd?

301

How to create an rdd?

300

What is an rdd?

314

Explain the top() and takeordered() operation?

327

What are the major features/characteristics of rdd (resilient distributed datasets)?

309

What is the difference between map and flatmap?

305

How to identify that the given operation is transformation or action?

277

Why we need compression and what are the different compression format supported?

284

Is ambari python client can be used to make good use of ambari api’s?

Mention what does the shell commands “capture” and “consistency” determines?

Explain what is composite type in cassandra?

Un-Answered Questions { Hadoop }

How is mapreduce related to cloud computing?

669

How can we see only top 15 records from the student.txt out of100 records in the HDFS directory?

586

Explain the difference between mahout & mllib?

Explain the lookup() operation in Spark?

235

Explain the hadoop configuration files at present?

673

What is wal and hlog in hbase?

307

Can you define what is Event Serializer in Flume?

Explain about tablespace?

Mention what is the meaning of broker in kafka?

508

How to change a column data type in Hive?

696

How does Cassandra write?

What are the types of hive ddl commands?

774

What is oozie in hadoop?

678

How will you design or modify schema in hbase programmatically?

157

Is the hdfs block size reduced to achieve faster query results?

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