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

How to change a column data type in Hive?

689

How Facebook Uses Hadoop, Hive and Hbase ?

707

Mention what is HiveServer2 (HS2)?

790

What are the different IDE available for Hive Development?

701

Is Hive useful when making data warehouse applications?

738

Explain REVERSE function in Hive with example?

767

What kind of datawarehouse application is suitable for Hive?

689

Explain REPEAT function in Hive with example?

804

What does the "USE" command in hive do?

793

Can you give us some examples, how Hadoop is used in real time environment?

703

What is Apache Spark?

369

explain the key features of Apache Spark?

336

How is Apache Spark better than Hadoop?

300

Explain the term paired RDD in Apache Spark?

403

How is RDD in Spark different from Distributed Storage Management?

380

Un-Answered Questions { Hadoop }

Define Cluster?

107

What happen if number of reducer is set to 0 in Hadoop?

494

What is Data Log in Kafka?

806

How to write a custom partitioner for a Hadoop MapReduce job?

652

How can we create znodes?

What is write ahead log(journaling) in Spark?

427

What is mlib in apache spark?

305

What is Streaming / Log Data?

How many daemon processes run on a hadoop cluster?

457

Is hadoop the future?

652

How should 'load' keyword is useful in pig scripts?

532

What is the problem with the small file in Hadoop?

651

Explain about the different channel types in Flume. Which channel type is faster?

171

What are the consistency levels for read operations in Cassandra?

What are file permissions in HDFS and how HDFS check permissions for files or directory?

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